ContactOut vs TheirStack: Data Enrichment Tool Comparison
Compare ContactOut and TheirStack side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
ContactOut and TheirStack both start free and target B2B contact and lead data enrichment, but they solve different problems. ContactOut is an email and phone finder with a LinkedIn browser extension, email campaigns, and a 700M plus profile bulk license. TheirStack is a job posting and technographics database that finds companies by technology usage and hiring activity.
Key takeaways
- ContactOut's paid plans start at $49 per month for the Email plan and $99 per month for the Email plus Phone plan.
- TheirStack's API, Webhooks and MCP plan costs $49 per month for 1,500 API credits, while its Free plan includes 50 company credits and 200 API credits per month.
- ContactOut lists 9 features and 8 integrations including Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail and Outlook.
- TheirStack lists 8 features and 5 integrations including Clay, LinkedIn Audiences, Make, N8N and Zapier.
- ContactOut was founded in 2015 and TheirStack was founded in 2021.
Reviewed and updated September 5, 2026
ContactOut vs TheirStack: Data Enrichment Tool Comparison
Sales teams evaluating B2B lead data and contact enrichment tools often narrow their shortlist to ContactOut and TheirStack. Both target the same job, but they cater to different workflows and budgets. This comparison covers pricing, features, and integrations so you can pick the right fit.
The Quick Answer
By each vendor's own wording, ContactOut lists one user per company limit on free, email and email + phone plans and browser extension for linkedin, while TheirStack lists job search and company search. A capability both offer can appear under different names, so read both feature lists below.
Both start at the same price point ($0/mo), so the decision comes down to features and workflow fit.
If your priority is finding accurate contact data for target accounts, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
ContactOut is Email and phone finder with a LinkedIn-focused browser extension, AI-powered email campaigns, and a 700M+ profile bulk license on the Team plan.
TheirStack is Job posting and technographics database for sales teams. Finds companies by the technologies they use and the roles they are hiring for, and enriches a company list with technographics and buying intent.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
ContactOut Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 5 emails, 5 phones and 5 exports per day | 5 emails / day |
| $49/mo | 300 exports / month | Unlimited emails | |
| Email + Phone | $99/mo | 600 exports / month | Unlimited emails and unlimited phones |
| Team / API | Contact Sales | Bulk license, 700M+ profiles | Contact us |
Source: ContactOut Pricing
TheirStack Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 50 company credits and 200 API credits per month |
| App | Usage-based | Company credit packs from 1,000 to 200,000 credits |
| API, Webhooks & MCP | $49/mo | 1,500 API credits per month |
| Datasets | Contact Sales | Jobs, Technographics and Buying intents datasets |
Source: TheirStack Pricing
Pricing Analysis
Both platforms start at the same $0/mo price point. The decision comes down to which feature set and tier structure works better for your expected usage.
Both platforms offer free tiers, so you can test each one before spending anything.
Features Breakdown
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- and 3 more listed below
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
ContactOut Key Features
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- Search portal
- Bulk license (700M+ profiles on Team)
- CSV export
TheirStack Key Features
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by ContactOut
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- Search portal
- Bulk license (700M+ profiles on Team)
- CSV export
Listed only by TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Integration Ecosystem
ContactOut Integrations
ContactOut connects with: Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail, Outlook.
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by ContactOut: Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Gmail, Outlook.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.
Use Case Recommendations
Best Fit for ContactOut
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that need a wide feature set (9 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for TheirStack
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | ContactOut | TheirStack |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 9 | 8 |
| Integrations | 8 | 5 |
| Founded | 2015 | 2021 |
Getting Started Checklist
- Define your B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected data credits or contact lookups to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
ContactOut and TheirStack both serve the B2B lead data and contact enrichment market. ContactOut offers a more accessible entry point, while TheirStack starts at $0/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit ContactOut and TheirStack for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between ContactOut and TheirStack?
- ContactOut is primarily an email and phone finder built around a LinkedIn browser extension, AI email campaigns, and a bulk license of over 700 million profiles on its Team plan. TheirStack is a job posting and technographics database that helps sales teams find companies by the technologies they use and the roles they are hiring for, then enriches company lists with buying intent data.
- Which tool is cheaper, ContactOut or TheirStack?
- Both tools start at the same $0 per month price point on their free tiers, so neither is inherently cheaper at entry. ContactOut's paid tiers are $49 per month for Email and $99 per month for Email plus Phone, while TheirStack offers a $49 per month API plan and usage-based company credit packs, so the better value depends on your expected usage.
- Does ContactOut or TheirStack have more integrations?
- ContactOut lists 8 integrations including Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail and Outlook. TheirStack lists 5 integrations including Clay, LinkedIn Audiences, Make, N8N and Zapier. The only integration both tools share is Zapier.
- Which tool is better for teams that need company technographics and hiring data?
- TheirStack is built specifically for job posting and technographics data, letting teams find companies by the technologies they use and the roles they are actively hiring for. ContactOut focuses instead on finding individual contact emails and phone numbers rather than company-level technographic or hiring signals.
- Can I try ContactOut or TheirStack before paying?
- Yes, both platforms offer free tiers so you can test them before spending anything. ContactOut's free plan includes 5 emails, 5 phones and 5 exports per day, while TheirStack's free plan includes 50 company credits and 200 API credits per month.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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