10 Best Tools to Find a CTO Contact Information (Phone & Email) for b2b sales

Finding a CTO’s phone number or email takes more than searching for “Chief Technology Officer.” CTOs use different titles, change companies, and leave outdated contact records behind. You need to find the right person and verify that their contact data is current.

We pulled CTO contact lists from all ten tools below, ran them against the same target accounts, and documented where each one breaks. Here is what we found. Teams building contact lists for other C-suite roles can compare our findings for business phone numbers for B2B sales for a parallel reference.

What Is a CTO Phone Number and Email Database and How Does It Work?

A CTO phone number and email database is a repository of direct dial numbers, mobile numbers, and professional email addresses for CTO-level executives, matched to their current employers. It aggregates records from professional networks, company registries, third-party data providers, and proprietary verification engines. The best databases regularly refresh contact records to account for changes in roles, companies, and contact details.

CTO Contact Tool Comparison Table

The table below compares each tool’s CTO phone number coverage across the dimensions that matter most for outbound sales teams.

This comparison reflects publicly available information as of publication. Verify current capabilities directly with each vendor before purchasing. Pricing changes frequently.

10 Best Tools to Find CTO Phone Numbers and Emails

Each tool approaches CTO contact discovery differently. Here is how they compare in terms of coverage, verification, freshness, and practical use for B2B sales teams.

Pintel.ai: Strong for Verified CTO Contacts and Global Coverage, UI and API Access

What it is: Pintel.ai helps B2B sales teams find CTO phone numbers and email addresses across industries and global markets. You can search directly for CTOs and other technical decision-makers, or first identify companies that match your ICP and then find the right people within those accounts.

Pintel.ai uses waterfall enrichment across 30+ data providers, combined with AI driven title matching and buying signals, to improve contact coverage and accuracy.

How Pintel.ai finds CTO phone numbers and emails:

• Find accounts and decision makers your way: Search directly for CTOs and other decision makers, or first identify target companies using your ICP rules and then find the right people within those accounts. Pintel.ai can enrich both companies and contacts with the data you need.
• Prioritize your preferred personas: Create a priority keyword list such as CTO → VP Engineering → Head of Engineering → CPTO. Pintel.ai first searches for a CTO in each target account. If one isn’t found, it automatically moves to the next keyword and returns the first relevant decision maker it finds.
• API access: Use Pintel.ai’s API to find new CTO contacts and enrich existing ones within your workflows.
• Only pay for the data you receive: Pintel.ai uses a pay-per-data model, so you only pay when you receive contact or company data. There is no cost for actions such as searching, filtering, or finding contacts.
• Find contacts with high coverage and accuracy: Pintel.ai combines proprietary data with waterfall enrichment to find verified phone numbers and email addresses across APAC, EMEA, GCC, MENA, and other global markets for your target accounts and decision-makers.
• Find contacts across industries: Build CTO and technical decision-maker lists across industries including software, SaaS, technology, healthcare, fintech, EdTech, cybersecurity, and more.
• Enrich the contacts you find: Once the right decision-makers are identified, enrich them with available phone numbers and email addresses using Pintel.ai’s multi-source waterfall.

Find accurate C-suite and domain decision makers: Pintel.ai helps you find C-suite executives and decision makers across functions, including technology, finance, marketing, sales, HR, and other domains.

ZoomInfo: Enterprise CTO Data, Weak on Mid-Market and Startup Tech Leaders

What it is: ZoomInfo is a legacy B2B data platform that aggregates contact records from company filings, website crawls, and a contributor opt-in network. It has been in the market for over a decade and is widely used in enterprise sales teams.

How ZoomInfo finds CTO contacts:

• Aggregates CTO records from SEC filings, job postings, and user-contributed data from its opt-in network
• Matches by title keyword (“Chief Technology Officer”) against company domain records
• Verifies mobile numbers through a third-party carrier-check layer
• Pushes records to Salesforce, HubSpot, and other CRMs through native integrations

Limitations for CTO outreach

• Keyword-only title matching: ZoomInfo’s title search runs on keywords. There is no “CPTO” field, no “Head of Engineering” bucket. You type “Chief Technology Officer” and get a keyword-matched list that includes people who left the role six months ago.
• Thin mid-market coverage: Below the Fortune 2000, the data gets thin fast. Targeting Series A through C CTOs in ZoomInfo produces short lists with stale records, which is exactly the segment that moves fastest and has the freshest budget.
• High cost without a signal layer: Annual contracts start above $15,000. For that price, you still need a separate signal layer because ZoomInfo does not tell you which of those CTOs is actually in a buying cycle right now.
• Firmographic-only ICP filters: The ICP filter is firmographic only: revenue band, headcount, industry. You cannot filter by engineering team size, current tech stack, or hiring velocity. Two CTOs who look identical in ZoomInfo can be at completely different buying stages.

Apollo.io: CTO Email, Limited Mobile Phone Verification

What it is: Apollo.io is an outbound sales platform that combines a contact database with a sequencing tool. It is widely used by SMB and mid-market sales teams for email-first outreach at lower price points.

How Apollo finds CTO contacts:

• Searches its own database by job title, company size, industry, and geography
• Matches email addresses using pattern-based email verification against company domains
• Has a basic ICP prompt feature, but it does not run at scale for CTO-variant title filtering
• Sequences outreach natively within the same platform after export

Limitations for CTO outreach

• Unreliable mobile attribution: You can see a mobile number for a CTO in Apollo, dial it, and reach a disconnected line or an entirely different person. The mobile verification layer does not consistently confirm attribution, only that the number is active.
• Email-first platform with phone added: Apollo is primarily an email platform that added phone data. For CTO outreach where the direct dial matters, it is not built for that use case and it shows in the hit rate.
• Noisy AI ICP output for title variants: The ICP prompt feature exists but does not reliably handle CTO-variant titles at scale. Running “find CTOs at companies building internal dev tools” in Apollo produces noisy output that requires significant manual cleanup.
• Phone credits deplete faster than projected: Credits deplete faster on phone searches than email searches. Teams doing high-volume CTO phone research will burn through a plan quicker than the pricing page suggests.

Cognism: CTO Mobile Numbers, Limited Coverage

What it is: Cognism is a European-focused contact data platform known for its Diamond Data verification process, which calls mobile numbers to confirm attribution before releasing them to customers.

How Cognism finds CTO contacts:

• Calls mobile numbers in its database to confirm the named person answers before releasing the record
• Indexes CTO-level records primarily from EU and UK professional networks and company filings
• Handles GDPR compliance natively within the export and sequencing workflow
• Verifies business emails through standard domain-pattern checks

Limitations for CTO outreach

• Diamond Data does not extend to US CTOs: Diamond verification means a human caller confirmed the mobile number is live and attributed correctly before Cognism releases it. That process exists for European CTOs. For US CTOs, Cognism returns standard database records with no equivalent human-confirmation layer behind them. The result is a connect rate gap that shows up immediately when you dial the two lists side by side.
• CTO turnover is fastest exactly where Cognism is weakest: Growth-stage US tech companies are where CTOs change roles most frequently, sometimes within 18 months of joining. Those are also the accounts Cognism covers with the least depth and the fewest re-verification cycles. If your ICP is Series A to C US SaaS companies, Cognism’s verification tier does not match the data freshness problem you are actually trying to solve.
• No title variant verification for CPTO or VP Engineering: Cognism’s Diamond Data pipeline is built around standard C-suite titles. CPTO, VP Engineering, and Head of Technology are not systematically run through the same human-verification process. If your CTO outreach relies on title variants to reach the actual technical decision maker, Cognism has no structured answer for that gap.

Lusha: Fast CTO Contact Lookup, Weak on Contact Freshness at Scale

What it is: Lusha is a browser extension and API that surfaces contact information from LinkedIn profiles and company pages. It is popular among individual sellers for point-of-research contact lookup rather than bulk list building.

How Lusha finds CTO contacts:

• Extracts contact data from LinkedIn profile pages using a Chrome extension overlay
• Matches records by company domain and name against its user-contributed database
• Exposes mobile and email data directly within the LinkedIn interface without switching tools
• Provides an API for teams integrating with CRM workflows

Limitations for CTO outreach

• Refresh depends on network activity, not scheduled cycles: Lusha’s data is sourced from colleagues who installed Lusha and looked up that profile. If no one on the contributor network has looked up that CTO recently, the record has not been refreshed. For a role that turns over every 18 to 24 months at growth-stage companies, this is a structural accuracy problem.
• No bulk ICP filtering: There is no bulk ICP filtering. Building a CTO list in Lusha means manually opening profiles one at a time through the browser extension. At any meaningful scale, this is not a workflow: it is a research exercise.
• Inconsistent title variant indexing: CPTO, VP Engineering, and Head of Technology records are indexed inconsistently. The title variant problem is not solved in Lusha, which means lists pulled by “CTO” alone will have gaps the tool cannot fill.

LinkedIn Sales Navigator: CTO Discovery with Limited Profile Email Data, No Phone Coverage

What it is: LinkedIn Sales Navigator is a subscription product built on top of LinkedIn’s member database. It is the most current source for discovering who holds a CTO-level role at any given company, because executives update their own profiles in real time.

How Sales Navigator finds CTO contacts:

• Searches LinkedIn members by job title, seniority, company size, industry, and geography with real-time accuracy
• Surfaces email addresses only when a member has chosen to make them publicly visible in their LinkedIn profile contact settings. In practice, fewer than 10 percent of CTO-level members share their email this way.
• Shows InMail credits as the primary outreach mechanism within the platform
• Does not provide phone numbers of any kind. Zero phone data is available through Sales Navigator natively.
• Advanced Plus plan syncs discovered contacts to Salesforce but does not enrich them with phone or email beyond what is on the profile

Limitations for CTO outreach

• Zero phone data, minimal email: We pulled 500 CTO profiles through Sales Navigator. Zero returned a phone number. 23 had a publicly visible email. That ratio tells you exactly what this tool is: a LinkedIn search engine with CRM notes, not a contact data platform.
• InMail produces low response rates for CTOs: The InMail approach for CTO outreach produces low response rates because CTOs receive high InMail volume and treat it as marketing noise. Compared to a direct dial that reaches them on their mobile, InMail is not a serious outreach mechanism for technical executives at growth-stage companies.
• Discovery always requires a second paid layer: Every CTO you identify in Sales Navigator still requires a separate enrichment step to get a phone number or confirmed email. That two-step workflow means you are paying for a discovery layer and then paying again for a contact layer. The combined cost exceeds what a single dedicated contact platform charges for both.
• Sparse in low-LinkedIn sectors: LinkedIn-only data means CTOs in manufacturing, healthcare, logistics, and public sector are chronically underrepresented. These are sectors where LinkedIn presence is sparse, profile information is minimal, and Sales Navigator returns thin lists with limited contact signals.

Hunter.io: CTO Email Pattern Search, No Phone Number Coverage

What it is: Hunter.io finds and verifies professional email addresses by identifying the email naming pattern a company uses and applying it to named individuals. It is a pure email tool with no phone data functionality.

How Hunter finds CTO contacts:

• Identifies the dominant email pattern at a company domain (firstname.lastname@, firstnamelastname@, etc.)
• Applies that pattern to the named CTO and verifies the resulting address against MX records and SMTP checks
• Returns a confidence score on each email address it surfaces
• Has a free tier that allows limited lookups without a subscription

Limitations for CTO outreach

• Requires prior target identification: Hunter.io only works if you already know who the CTO is and where they work. You enter a name and a company domain, and Hunter returns an email guess. That is a verification step, not a prospecting workflow. It cannot help you find who the CTO of a target company is.
• Pattern matching fails for non-standard formats: Email pattern matching breaks down for CTOs who use a non-standard format, a personal domain, or a shared leadership alias. At early-stage companies, where the CTO often set up the email domain themselves, the pattern Hunter identifies may apply to no one else at the company.
• No phone data under any plan: No phone data exists in Hunter.io under any plan or tier. If your outreach cadence includes a direct dial call, Hunter cannot contribute to that step under any configuration.
• Works only as a supporting step: At 50-plus lookups, the free tier cuts off and paid plans become necessary. For the narrow use case it covers, Hunter works well. But it only ever functions as a supporting tool behind a platform that can actually surface the CTO in the first place.

ContactOut: LinkedIn CTO Contact Extraction, Weak on Non-LinkedIn Profiles

What it is: ContactOut is a Chrome extension that extracts contact information from LinkedIn profiles, including some phone and email data for technical executives. It works entirely within the LinkedIn ecosystem and has no off-LinkedIn data coverage.

How ContactOut finds CTO contacts:

• Overlays extracted contact data on top of LinkedIn member profiles while browsing
• Matches names and company domains against its aggregated database to surface phone and email records
• Provides a dashboard for exporting extracted records in bulk

Limitations for CTO outreach

• One-profile-at-a-time browser workflow: The browser extension workflow is one profile at a time. You open a LinkedIn page, ContactOut overlays what it has, you copy or export that record, and then you open the next profile. At 50 CTOs, this is manageable. At 300, it is a full day of manual clicking that a prospecting platform would handle in minutes.
• No ICP filter or prospect discovery: There is no ICP filter inside ContactOut. You cannot type “CTOs at Series B SaaS companies in the UK with 50 to 200 engineers” and get a list. You have to build that list in LinkedIn first, then run ContactOut across each result manually. The tool is entirely dependent on you doing the discovery work beforehand.
• Incomplete title variant coverage: Title variant coverage is inconsistent. CPTO and VP Engineering records surface less reliably than standard CTO profiles, which means a list built through ContactOut will have structural gaps for the title variants that are increasingly common at modern tech companies.
• Phone numbers lack a traceable verification trail: Phone numbers ContactOut surfaces for technical executives often lack clear verification trail. You get a number that may have been pulled from a profile, a directory, or a contributor submission, with no consistent attribution that tells you how recently it was confirmed.

Clearbit: CTO Email Enrichment via API, Weak on Direct Dial Coverage

What it is: Clearbit is an enrichment API that appends firmographic and contact data to records already in a CRM or marketing platform. It is not a prospecting tool; it is a data-append layer for accounts already in your pipeline.

How Clearbit finds CTO contacts:

• Matches company domain and person name against its database to return firmographic fields, job title, and email address
• Integrates natively with Salesforce, HubSpot, and Segment to auto-enrich inbound records as they enter the pipeline
• Updates CTO fields automatically when a new account is created in the CRM

Limitations for CTO outreach

• Cannot discover CTOs, only enrich existing records: You cannot search for CTOs in Clearbit. There is no prospect finder, no ICP filter, no list builder. Clearbit operates entirely on records you already have: a company domain comes in, enrichment data comes back. If you want to build a CTO list from scratch, Clearbit is not the tool.
• Requires developer or RevOps setup to deploy: Getting Clearbit into production requires an API integration. That means involving your RevOps or engineering team to set it up, test it, and maintain it. Sales reps cannot self-serve their way into Clearbit the way they can with a browser extension or a prospecting platform.
• Minimal direct dial coverage for CTOs: Direct dial mobile coverage for CTOs is thin. Clearbit’s strength is firmographic enrichment: company size, revenue band, industry, technology stack. For phone outreach to technical executives, it adds limited value that a dedicated contact data platform would cover far more reliably.
• Unpredictable volume-based pricing: Pricing scales with API call volume, which is difficult to forecast for CTO enrichment workflows. A team enriching inbound leads sporadically will find Clearbit cost-efficient. A team running high-volume CTO append requests across extensive account lists will see costs climb in ways that were not obvious at onboarding.

Seamless.ai: CTO Contact Finding, Limited Contact Accuracy

What it is: Seamless.ai uses AI to research and verify CTO contact records in real time rather than pulling from a static database. It is built primarily for US-based, high-volume outbound teams on an aggressive dialing cadence.

How Seamless.ai finds CTO contacts:

• Performs real-time AI research on CTO profiles rather than querying a pre-built static database
• Verifies phone and email records against active data sources at the time of the search
• Surfaces newer CTO contacts that legacy static databases have not yet indexed
• Provides a Chrome extension for in-browser research alongside the core platform

Limitations for CTO outreach

• Real-time research produces attribution errors: Real-time research introduces a consistency problem. In one session, we saw the same mobile number returned for two different CTO profiles at separate companies. When a tool researches contacts on demand rather than from a pre-verified database, attribution errors like this happen and are not caught before the number reaches your dialing list.
• Non-US coverage drops sharply: Outside the US, the data thins fast. Seamless.ai is built for the US outbound motion. European, APAC, and Latin American CTO records return with noticeably lower coverage and less verification confidence. If your CTO target list crosses geographies, you will quickly exhaust what Seamless.ai can reliably return.
• Title variant results require manual cleanup at scale: CPTO, VP Engineering, and Head of Technology are not first-class title categories in the Seamless.ai search interface. You can search for them, but the results require manual cleanup to remove mismatches and near-matches that do not fit your actual ICP. At scale, this overhead is significant.
• Credit burn rate higher than pricing implies: The credit model charges differently for phone lookups versus email lookups, and the credit burn rate for CTO phone research is higher than the pricing page implies. Teams that enter Seamless.ai expecting unlimited outreach discover the ceiling quickly when running CTO-specific dialing campaigns.

The tools above cover the full spectrum of CTO contact sourcing approaches. The next section explains how each was assessed to produce this list.

Why CTO Phone Numbers and Emails Are Harder to Find Than Other C Suite Contacts

After reviewing these tools, one thing becomes clear: finding a CTO contact is not simply a matter of having a large database.

The gaps usually come down to three areas.

1. Title Coverage

CTOs do not always appear under the title “Chief Technology Officer.”

Depending on the company and market, you may find:

• Head of Engineering
• VP Engineering
• CPTO
• Head of Technology
• Director of Technology
• Directeur Technique

If a tool relies too heavily on exact title matching, it can miss the person who actually owns the technology function.

The takeaway: A larger contact database does not necessarily mean better CTO coverage. Title coverage matters just as much.

2. Contact Freshness

CTO records can become outdated when people change companies, move into different roles, or when companies restructure their technology leadership.

That creates a simple problem: the database may still contain a CTO record, but the person attached to that record may no longer be the right contact.

This can lead to:

• Outdated phone numbers
• Former CTOs remaining attached to accounts
• Incorrect company associations
• More manual verification before outreach

The takeaway: For executive contact data, freshness is part of coverage. Finding the right person once is not enough if the record is no longer current.

3. Verification Depth

“Verified” can mean different things across data providers.

A phone number may be confirmed as active without confirming that it belongs to the specific CTO you are trying to reach.

For a CTO phone number, there are three separate checks:

1. Is the number active?
2. Does it belong to the right person?
3. Does that person still hold the CTO role at the target company?

A number can pass the first check and fail the other two.

The takeaway: Phone verification is not the same as contact verification. The quality of the data depends on how deeply the provider verifies the record.

The Three Factors That Matter Most

The tool review above shows why CTO contact quality cannot be judged by phone or email coverage alone.

We evaluated these tools around three factors:

Title Coverage → Verification Depth → Contact Freshness

Together, these determine whether a tool can actually help a sales team find the right CTO, with usable contact information, at the right company.

This is also why two tools with similar database sizes can produce very different results when building a CTO contact list.

How We Evaluated These Tools for Finding CTO Contacts

Every tool was assessed against the Three-Layer CTO Contact Check: Title Coverage, Verification Depth, and Contact Freshness.

Title Coverage: Does the tool index CTO-variant titles beyond Chief Technology Officer?

Verification Depth: What does the tool’s process actually confirm: active number, correctly attributed contact, or current employer match?

Contact Freshness: How recently was each CTO record verified, and on what refresh cycle?

A tool that passes all three layers reliably on a CTO phone number search produces outreach lists with fewer wrong numbers, fewer bouncebacks, and fewer dials to executives who have moved on.

Finding a CTO phone number is a data freshness problem, not a coverage problem. The gap between tools is how recently records were verified and how completely they account for role and title movement in the 90 days before outreach.

Final Takeaway

No single tool on this list wins every dimension. ZoomInfo and Cognism lead in their respective regions for verified phone coverage. Hunter.io and Clearbit lead on email enrichment and API integration. Apollo.io leads on email volume at lower cost.

Pintel.ai is the only platform that combines a multi-provider waterfall for verified CTO contacts with non-LinkedIn data sources and a buying signal layer across all geographies. For teams targeting CTOs across multiple sectors, confirm title variant coverage, request a verified sample in your target market, and validate freshness dates before committing to any provider.

The Three-Layer CTO Contact Check (Title Coverage, Verification Depth, Contact Freshness) is the fastest way to cut through vendor claims and test what each tool actually delivers on CTO phone number data in your specific market.

Frequently Asked Questions

Which tools can find CTO contact data at scale for B2B sales?

Pintel.ai helps B2B sales teams find CTO phone numbers and email addresses across target accounts. It uses proprietary data and waterfall enrichment across 30+ providers to improve CTO contact coverage and accuracy.

How can I find CTOs at companies that match my ICP for B2B sales?

Define your ICP using criteria such as industry, company size, location, and other account attributes. Pintel.ai lets you identify matching accounts and find CTOs or other relevant decision makers within them.

How can I find CTO phone numbers and email addresses across global markets?

Pintel.ai provides CTO phone numbers and email addresses across APAC, EMEA, MENA, GCC, and other global markets using proprietary data and waterfall enrichment across 30+ providers.

How can I find C-level executive contact data at scale for B2B sales?

Pintel.ai helps you find contact data for C-level executives, including CEO, CIO, CMO, CFO, CTO, and other executive roles, with phone numbers and email addresses across target accounts.

How can I verify whether a CTO’s phone number and email address are accurate?

Check whether the contact information is verified and whether the person still holds the CTO role. Pintel.ai uses multiple data sources and waterfall enrichment to improve contact accuracy and freshness.

Which tools can enrich existing CTO contact data with phone numbers and email addresses?

Pintel.ai can enrich existing CTO contacts with available phone numbers and email addresses using its proprietary data and waterfall enrichment across 30+ providers.

Which tools provide API access to CTO contact data?

Pintel.ai provides API access to find new CTO contacts and enrich existing contact records with phone numbers and email addresses.

Can I use an API to find new CTO contacts and enrich existing contacts?

Yes. Pintel.ai’s API can be used to find new CTO contacts and enrich existing contacts with available phone numbers and email addresses.

How can I find buying signals before reaching out to CTOs?

Look for signals such as CTO changes, engineering hiring, funding, product launches, and technology changes. Pintel.ai lets you use buying signals alongside account and contact data to identify relevant companies and decision makers.

Which tools can identify buying signals such as CTO changes and engineering hiring?

Pintel.ai identifies buying signals such as leadership changes, engineering hiring, funding, product launches, and technology changes, helping sales teams prioritize accounts before outreach.

What buying signals should B2B sales teams look for when targeting CTOs?

Common signals include CTO changes, engineering hiring, funding, product launches, technology changes, and company growth. The most relevant signal depends on your ICP and product.

Can I find CTOs and other technical decision makers if a company does not have a CTO?

Yes. Pintel.ai lets you create a priority list such as CTO, VP Engineering, Head of Engineering, and CPTO. If a CTO is not found, it moves through the list to identify another relevant technical decision maker.

Can I find other C-suite and domain decision makers besides CTOs?

Yes. Pintel.ai helps you find C-suite and domain decision makers across technology, finance, marketing, sales, HR, and other functions.