SignalHire Review [2026]: What You Need to Know

SignalHire occupies a clear niche: affordable, real-time verified contact data for recruiters and sales teams who need emails and phone numbers without enterprise pricing. With an 850M+ profile database, a one-click browser extension, and no per-seat charges on any plan, it gives small and mid-size teams a single subscription for finding contacts and starting outreach.

To write this SignalHire review, we analyzed it thoroughly. We believe it's the right choice if:

• You need verified emails and phone numbers at a low price

• Your team shares one account and you want to avoid per-seat fees

• You primarily source contacts from LinkedIn, GitHub, or other social profiles

• You need a lightweight ATS alongside your contact data

• You're running moderate-volume outbound and want built-in email sequences

However, SignalHire might not be the best choice if:

• You need buyer intent data to know which accounts are actively in-market

• You require conversation intelligence to understand what's happening inside deals

• You want AI-powered outreach that drafts messages from full account context

• Your team needs enterprise integrations with Greenhouse, Lever, or Workday

• You're building account-based marketing campaigns across multiple channels

In this case, consider ZoomInfo: an AI GTM platform that goes well beyond contact data. Built on 500M contacts, 100M companies, 135M+ verified phone numbers, and 200M+ verified business emails, ZoomInfo adds buyer intent signals, conversation intelligence, and AI-powered execution through GTM Workspace for sellers and GTM Studio for marketers and RevOps. Where SignalHire finds contacts, ZoomInfo helps teams decide which contacts to prioritize, what to say, and when to engage.

We've included a detailed look at ZoomInfo later in this review, as the natural next step for teams that have outgrown standalone contact data tools. To explore ZoomInfo's capabilities, start with ZoomInfo Lite for free.

What is SignalHire?

SignalHire is a real-time verified contact platform founded in 2015 and headquartered in Warsaw, Poland. The company started as a browser extension for recruiters who needed verified emails and phone numbers from LinkedIn profiles. Over time, it expanded into a broader platform serving both recruiting and B2B sales teams.

Today, SignalHire is built around five products: a searchable Contact Database with 850M+ profiles and 30M+ companies, a Browser Extension for one-click contact reveals on social profiles, an Email Sequences module for automated multi-step outreach, a developer REST API for programmatic data access, and a built-in ATS for candidate pipeline management.

Source: SignalHire

The company is bootstrapped with $0 in external funding, reaching roughly $7.8M in ARR with about 45 employees. SignalHire claims more than 3 million users, listing Tesla, Intel, Amazon, Deloitte, Microsoft, and Salesforce among its customers.

SignalHire's target buyer is a cost-conscious SMB or mid-market team that needs contact discovery at scale. Plans start at $57/month (billed annually), positioning it as a cheaper alternative to larger platforms, with a free tier that requires no credit card.

SignalHire Pros & Cons

SignalHire Review: How It Works & Key Features

Contact Database: SignalHire offers real-time verified contacts across 850M+ profiles with a pay-on-success credit model.

SignalHire's core product is its contact discovery engine. The database covers 850M+ profiles and 30M+ companies, with the platform claiming email availability for up to 90% of profiles and phone numbers for up to 80%. Marketing materials state up to 95% email accuracy through a three-step verification process.

Source: SignalHire

Contact discovery works through three channels. The web dashboard's email finder lets users search by name, job title, company domain, phone number, or social media profile URL. The browser extension reveals contacts directly on social profiles. And bulk enrichment handles up to 1,000 profiles per run via TXT or CSV import.

The credit model deserves attention. One credit returns all available contact information for a profile (emails and phone numbers) and charges only on success. If no contacts are found, no credit is consumed. This reduces waste compared to tools that charge per query regardless of results.

Search filters include name, title, company, location, years of experience, skills, and industry, with boolean operators for more targeted queries. Profiles can be saved to Lead Lists for sales or Job Projects for recruiting without spending credits. Export options include CSV or PDF and one-click push to connected CRM or ATS systems.

Source: SignalHire

Browser Extension: A one-click contact reveal tool that works across multiple social platforms.

The browser extension is how most SignalHire users interact with the platform daily. With over 350,000 users and a "Featured" badge on the Chrome Web Store, it overlays onto social profiles so users never leave the page they're browsing.

The workflow is simple: navigate to a profile, click the SignalHire icon, and hit "Reveal Contacts." The extension cross-verifies results in real time and displays emails, phone numbers, and social links in the popup. No connection with the profile owner is required.

Source: SignalHire

What sets this extension apart is its multi-platform reach. While most contact-reveal extensions work only on LinkedIn, SignalHire covers multiple platforms including LinkedIn, Facebook, Twitter, GitHub, MeetUp, Dribbble, Gmail, Xing, and Quora. This makes it useful for technical recruiting (sourcing developers on GitHub) and sales prospecting across different professional networks.

The extension includes direct ATS/CRM export from the popup, supporting one-click pushes to Zoho Recruit, Salesforce, Pipedrive, HubSpot, and others. Free accounts receive 5 credits per month by default, rising to 10 with the extension installed.

Email Sequences: Built-in multi-step outreach that connects directly to your discovered contacts.

Email Sequences is SignalHire's automated outreach module. The pitch is simple: contacting prospects or candidates one by one eats the day in copy-paste and reminders. Sequences automate the follow-ups.

Users create a sequence, add steps with delays and stop rules, select prospects from Lead Lists or Job Projects, set a sending schedule, then launch. Emails go through the user's own connected mailbox (Outlook/Microsoft 365 via OAuth or custom SMTP/IMAP for any professional address).

Source: SignalHire

The feature includes step-level analytics tracking opens, clicks, and replies, personalization variables for name, company, and role, and auto-pause on reply to prevent follow-ups after someone responds. The platform recommends 3 to 6 emails per sequence with 2 to 3 business days between the first and second email.

The main differentiator is tight integration with SignalHire's contact layer. Sequences operate directly on Lead Lists and Job Projects, so there's no CSV export/import step between finding contacts and reaching out. Duplicate outreach is prevented automatically.

The limitations are notable. There is no documented A/B testing, no AI-generated copy suggestions, and no LinkedIn touchpoint steps within the sequence builder. For teams running multi-channel campaigns, this module covers the basics but stops there.

Integrations: SignalHire connects with 15+ ATS and CRM systems, though some major platforms are missing.

The integrations page lists connections to Salesforce, Pipedrive, Zoho CRM, Zoho Recruit, JazzHR, Recruitee, JobAdder, Loxo, Catsone, Crelate, Recruiterflow, Ceipal, Reply.io, PCRecruiter, Avionte, Workable, Ashby, and Vincere. All integrations work through the browser extension's "Export this profile" function, requiring a one-time credential setup per system.

Source: SignalHire

For teams already using these platforms, the integration works well. Export a profile directly from a LinkedIn page into your CRM without switching tabs.

However, Greenhouse, Lever, Workday, iCIMS, and SmartRecruiters are all absent. These dominate the enterprise ATS market, and their absence means larger recruiting teams often can't connect SignalHire to their primary workflow. There are also no Zapier, Make, or middleware connectors mentioned, limiting automation options for non-listed tools.

Pricing: Credit-based subscriptions starting at $57/month with no per-seat fees.

SignalHire uses a credit-based subscription model. All paid tiers include unlimited users, unlimited exports, the browser extension, ATS/CRM integration, and API access. There are no per-seat charges.

Free Plan: $0/month, no credit card required. Five credits on signup, rising to 10 per month with the extension installed.

Emails Only: $69/month for 1,000 credits (monthly) or $57/month for 12,000 credits (annual).

Phone Numbers Only: $69/month for 435 credits (monthly) or $57/month for 5,400 credits (annual).

Emails & Phones: $99/month (monthly) or $83/month (annual) for unlimited credits (up to 2000 credits per month, based on the fair usage policy).

Enterprise: Custom pricing for bulk licensing.

The no-per-seat model is SignalHire's strongest commercial advantage. A 10-person recruiting team pays the same as a single user, which makes it far cheaper than per-seat competitors when multiple people share an account.

Where SignalHire Falls Short

SignalHire delivers good value for teams focused on contact discovery, but several limitations surface as needs grow beyond finding emails and phone numbers.

Accuracy Gap Between Marketing and Reality. SignalHire claims up to 95% email accuracy and up to 75% phone accuracy. User reviews tell a different story. Some reviewers on Capterra report that "30% of the information is good," while feedback on TrustRadius indicates phone coverage "less than 50% of the time" in certain use cases. SignalHire holds a 3.9 out of 5 on G2 across 56 reviews. Test accuracy during the free tier before committing.

No Intent Data or Account Intelligence. SignalHire tells you how to reach someone. It does not tell you whether they're researching solutions, hiring for relevant roles, or showing buying signals. There's no intent data, no technographic tracking, no account scoring, and no signal-triggered workflows. Sales teams using SignalHire alone must decide who to contact based on title and company, without insight into timing or readiness.

Missing Enterprise ATS Integrations. Greenhouse, Lever, Workday, iCIMS, and SmartRecruiters are all absent from SignalHire's integration list. For recruiting teams at companies using these platforms (which represent most of the enterprise ATS market), this creates a manual export step that undercuts the efficiency the tool is meant to provide.

Limited Outreach Capabilities. The email sequences module covers the basics (multi-step campaigns, auto-pause, open and reply tracking) but lacks A/B testing, AI-assisted copywriting, LinkedIn touchpoints, and multi-channel sequencing. Teams running high-volume outreach will likely outgrow it quickly.

Billing Friction. Multiple reviews on Capterra and Software Advice report unexpected auto-renewal charges and difficulty obtaining refunds. At least one reviewer mentions being charged for pulling a publicly available LinkedIn profile URL. These concerns are worth noting, particularly around annual commitments.

Geographic Coverage Gaps. User feedback on G2 flags weak India and Asia-Pacific coverage as a recurring limitation. Teams with primary sourcing needs in these regions should verify coverage during evaluation.

These limitations reflect SignalHire's design as a focused, affordable contact-finding tool. But they create a clear gap for teams that need more than contact data, specifically teams that want to know which contacts matter most, when to reach out, and what to say.

Top SignalHire Alternative for Growing GTM Teams: ZoomInfo

ZoomInfo addresses SignalHire's limitations by providing not just contact data, but the intelligence and execution layer that go-to-market teams need. Where SignalHire focuses on contact discovery, ZoomInfo is an AI GTM platform built on a large B2B data foundation: 500M contacts, 100M companies, 135M+ verified phone numbers, and 200M+ verified business emails.

Its GTM Context Graph processes 1.5B+ data points daily, combining this data with your CRM records, conversation transcripts, and behavioral signals to reveal not just what happened in your accounts, but why. That intelligence reaches your team through GTM Workspace for sellers, GTM Studio for marketers and RevOps, or APIs and MCP in any front-end.

Founded in 2007 by Henry Schuck, ZoomInfo is a public company (NASDAQ: GTM) with $1.25 billion in annual revenue, 35,000+ customers worldwide, and enterprise clients including Adobe, Snowflake, Thomson Reuters, and Databricks.

Comprehensive B2B Data: ZoomInfo provides the largest verified contact and company database in the industry.

ZoomInfo's data foundation covers 500M contacts, 100M companies, 135M+ verified phone numbers, 120M direct dials, and 200M+ verified business email addresses. Beyond contacts, the platform offers 300+ company attributes for segmentation, department org charts with direct dials, technographic profiles covering 30,000+ technologies across 30M+ companies, and firmographics including revenue, headcount, and corporate hierarchies.

This data comes from multiple sources: automated ML scanning of 28 million site domains daily, third-party partner data covering 95 million businesses, a community of 200,000+ users who share business contact info back into the system, and an in-house Data Training Lab of 300+ human researchers. The result is up to 95% accuracy on first-party data.

The data advantage has outside validation. In a Fortune 500 competitive RFP analyzing 25 million contacts across vendors, an independent consultant concluded that "no other competitor came even close." ZoomInfo has been named a Leader in the Forrester Wave for Intent Data Providers (Q1 2025) and a Leader in the Gartner Magic Quadrant for ABM Platforms for two consecutive years.

"ZoomInfo gives us the information we need to execute. We don't have to spend our time digging. It's already there, so we can be three steps ahead." (Vensure)

Buyer Intent and Account Intelligence: ZoomInfo reveals which accounts are actively in-market, not just who works where.

This is where the gap between a contact finder and a GTM platform becomes clearest. ZoomInfo Intent tracks signals from 210 million IP-to-Organization pairings and 6 trillion+ new keyword-to-device pairings sourced monthly. When a company's employees start researching topics related to your product, ZoomInfo surfaces that activity so sales teams can reach out while interest is fresh.

Guided Intent, exclusive to ZoomInfo, identifies topics historically correlated with deal success rather than requiring manual topic selection. Instead of guessing which keywords matter, the system analyzes your closed-won deals and finds the research patterns that preceded them.

WebSights adds another signal layer by resolving anonymous website traffic to companies, including buying team identification and direct contact info, with Automatic Traffic Filtering that separates real visitors from bots.

None of this exists in SignalHire. A contact database tells you who to reach. Intent data tells you when they're most likely to respond.

Seismic attributed 39% of active pipeline to opportunities identified or influenced by ZoomInfo signals, reporting 54% productivity gains and 11.5 hours saved per week per seller. (Seismic)

AI-Powered Execution: GTM Workspace gives sellers an AI-driven interface for account research, outreach, and deal management.

GTM Workspace is the seller's front-end to ZoomInfo's GTM Context Graph, which processes 1.5B+ data points daily by combining ZoomInfo's B2B data with a customer's CRM records, conversation transcripts, and behavioral signals. The result is an intelligence layer that captures not just what happened in a deal, but why it happened.

In practice, sellers open GTM Workspace to a prioritized account feed where AI-drafted outreach already addresses the concerns the system identified. The AI Assistant produces one-click account briefs pulling CRM history, company news, signals, and stakeholder context into a summary. The Action Feed streams in-market buyer signals with pre-drafted actions. Views provide dynamic interfaces combining CRM data with real-time buying signals.

SignalHire's email sequences let you send follow-ups. GTM Workspace tells you which accounts to prioritize, what each prospect cares about, and drafts the message accordingly.

"Anything that minimizes our team's need to switch contexts is beneficial. ZoomInfo offers one view, eliminating the need to navigate between systems." (Spekit)

GTM Studio and Universal Access: ZoomInfo's intelligence reaches marketers, RevOps, and any third-party tool.

ZoomInfo’s GTM Studio is the front-end for marketers, RevOps, and GTM engineers. It lets teams build audiences using natural language, enrich with first- and third-party data, define triggers, and activate plays across email, ads, calls, and direct mail, all without engineering support. Expansion plays that used to take 3 weeks now launch in 30 minutes.

For teams that build beyond ZoomInfo's own products, APIs and MCP expose the same intelligence to any custom agent, internal tool, or partner platform. API access is included in all relevant plans, and MCP is available through partners including Anthropic Claude and Google.

The ZoomInfo App Marketplace lists 120 partner integrations across CRM, Marketing Automation, Sales Engagement, and more, including Salesforce, HubSpot, Microsoft Dynamics 365, and Snowflake. ZoomInfo also connects with Greenhouse and Bullhorn, covering ATS integrations that SignalHire lacks.

ZoomInfo maintains security certifications including ISO 27001, ISO 27701, SOC 2 Type II, and TRUSTe GDPR and CCPA, all renewed annually. For enterprise buyers in regulated industries where SignalHire has no published third-party security certifications, this is often a procurement requirement.

SignalHire or ZoomInfo: Comparison Summary

Final Verdict

The choice between SignalHire and ZoomInfo comes down to what your team actually needs.

Choose SignalHire if you need an affordable contact-finding tool and your primary goal is getting verified emails and phone numbers into your CRM or outreach workflow. It's well-suited for small recruiting agencies sharing a single account, lean sales teams running moderate-volume outbound, and individual sourcers who work primarily from LinkedIn and GitHub. The no-per-seat pricing makes it one of the cheapest options for teams that need shared access to contact data without enterprise overhead.

Choose ZoomInfo if your go-to-market motion requires more than contact data. When your team needs to know which accounts are researching your category, which stakeholders are involved in the buying decision, what to say based on full deal context, and how to orchestrate outreach across multiple channels, ZoomInfo provides the data, intelligence, and execution in one platform. The investment is higher than SignalHire, but for teams where revenue depends on reaching the right person with the right message at the right time, the intelligence justifies the cost.

Get started with ZoomInfo Lite for free.

The distinction is scope. SignalHire finds contacts. ZoomInfo turns contacts into closed deals by adding the intelligence and execution that tell you which contacts to pursue, when to engage them, and what to say.

SignalHire FAQ

Is SignalHire free to use?

Yes. SignalHire offers a permanent free tier that requires no credit card. New accounts start with 5 contact retrieval credits, and installing the browser extension raises the monthly allocation to 10 free credits. The free plan provides access to the full 850M+ profile database. ZoomInfo also offers a permanent free tier called ZoomInfo Lite, which includes 10 monthly export credits, access to 100M+ verified profiles, the ReachOut Chrome Extension, and WebSights Lite for website visitor identification.

How accurate is SignalHire's contact data?

SignalHire claims up to 95% email accuracy and up to 75% phone accuracy through its three-step verification process. User reviews paint a more mixed picture. Some Capterra reviewers report that roughly 30% of data is usable, while TrustRadius feedback indicates phone coverage below 50% in certain use cases. The platform holds a 3.7 out of 5 on G2 across 56 reviews. The free tier is a good way to test accuracy for your specific market before committing.

Does SignalHire integrate with Greenhouse or Lever?

No. SignalHire's integration list includes Salesforce, Pipedrive, Zoho, JazzHR, Recruitee, and several other ATS and CRM platforms, but Greenhouse, Lever, Workday, iCIMS, and SmartRecruiters are not available. ZoomInfo's App Marketplace includes 120+ integrations covering these enterprise ATS platforms along with major CRMs and marketing automation tools.

How does SignalHire's pricing compare to ZoomInfo?

SignalHire publishes its pricing: paid plans start at $57 per month (annual) for email-only credits, with no per-seat charges. ZoomInfo uses custom-quoted pricing based on seats, credit volume, features, and company size, with no published dollar amounts. SignalHire is cheaper for small teams that only need contact data. ZoomInfo's higher price includes buyer intent data, conversation intelligence, AI-powered execution, marketing automation, and enterprise integrations that SignalHire does not offer.

Does SignalHire offer buyer intent data?

No. SignalHire is a contact data platform without intent data, technographic tracking, account scoring, or signal-triggered workflows. Teams using SignalHire must determine outreach timing and prioritization on their own. ZoomInfo includes buyer intent tracking from 210 million IP-to-Organization pairings and 6 trillion+ monthly keyword-to-device pairings, along with its Guided Intent feature that identifies topics historically correlated with closed deals.

What is SignalHire's "unlimited" plan?

SignalHire offers an "unlimited" plan at $99 per month for Emails & Phones. However, multiple Capterra reviewers report that this plan has a monthly credit cap of roughly 5,000 credits on annual billing. The "unlimited" label has been disputed by users who expected genuinely unrestricted usage. Confirm the exact terms before purchasing.

Can SignalHire replace a full sales engagement platform?

SignalHire's email sequences feature covers basic automated outreach: multi-step campaigns, open and reply tracking, auto-pause on reply, and personalization variables. It lacks A/B testing, AI-generated copy, LinkedIn touchpoints, and multi-channel sequencing. For teams running high-volume outreach across multiple channels, a dedicated sales engagement platform or ZoomInfo's GTM Workspace (which includes AI-drafted outreach based on full account context) would be more appropriate.

Does SignalHire have any security certifications?

SignalHire states it is GDPR and CCPA compliant. No SOC 2, ISO 27001, or equivalent third-party security certifications appear on the website or in documentation. For enterprise buyers in regulated industries where third-party security audits are a procurement requirement, this may be a concern. ZoomInfo maintains ISO 27001, ISO 27701, SOC 2 Type II, and TRUSTe certifications, all renewed annually.