Adapt.io vs TheirStack: Data Enrichment Tool Comparison
Compare Adapt.io and TheirStack side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
Adapt.io is a B2B lead intelligence platform founded in 2016 with 250M+ business contacts and 10M+ company profiles, while TheirStack is a job posting and technographics database founded in 2021. Both start free at $0/mo. Adapt.io lists 10 features and 6 integrations, TheirStack lists 8 features and 5 integrations, so the choice depends on budget and workflow fit.
Key takeaways
- Adapt.io was founded in 2016 and lists 250M+ business contacts plus 10M+ company profiles.
- TheirStack was founded in 2021 and focuses on job posting and technographics data for sales teams.
- Both platforms offer a free plan starting at $0 per month.
- Adapt.io's paid tiers include Starter at $49 per month and Basic at $99 per month.
- TheirStack's API, Webhooks and MCP plan costs $49 per month for 1,500 API credits per month.
Reviewed and updated September 5, 2026
Adapt.io vs TheirStack: Data Enrichment Tool Comparison
Finding the right data enrichment tool can directly impact your revenue pipeline. Adapt.io and TheirStack both aim to solve the same core problem (finding accurate contact data for target accounts), yet they approach it differently. Let's break down the specifics.
The Quick Answer
By each vendor's own wording, Adapt.io lists 250m+ business contacts and 10m+ company profiles, 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
Adapt.io is B2B lead intelligence platform with 250M+ contacts, Prospector Chrome extension, and data enrichment with 50+ attributes.
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
Adapt.io Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 25 Email Credits, 25 Enrichment Credits, 25 Contacts per day | 25 Email Credits |
| Starter | $49/mo | 500 Email Credits, 500 Enrichment Credits, 50 Contacts per day | 500 Email Credits |
| Basic | $99/mo | 1,000 Email Credits, 100 Phone Credits, 1,000 Enrichment Credits | 1,000 Email Credits |
| Custom | Contact Sales | Custom | - |
Source: Adapt.io 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
- 250M+ business contacts
- 10M+ company profiles
- Prospector Chrome extension
- Data enrichment with 50+ attributes
- Lead builder with advanced filters
- ABM list building
- and 4 more listed below
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
Adapt.io Key Features
- 250M+ business contacts
- 10M+ company profiles
- Prospector Chrome extension
- Data enrichment with 50+ attributes
- Lead builder with advanced filters
- ABM list building
- 3,000+ tech sector classifications
- Saved searches
- CSV export
- API access
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 Adapt.io
- 250M+ business contacts
- 10M+ company profiles
- Prospector Chrome extension
- Data enrichment with 50+ attributes
- Lead builder with advanced filters
- ABM list building
- 3,000+ tech sector classifications
- Saved searches
- CSV export
- API access
Listed only by TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Integration Ecosystem
Adapt.io Integrations
Adapt.io connects with: Salesforce, HubSpot, Zoho CRM, Marketo, Outreach, Zapier.
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by Adapt.io: Salesforce, HubSpot, Zoho CRM, Marketo, Outreach.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.
Use Case Recommendations
Best Fit for Adapt.io
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that need a wide feature set (10 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (6 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 | Adapt.io | TheirStack |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 10 | 8 |
| Integrations | 6 | 5 |
| Founded | 2016 | 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
Adapt.io and TheirStack both serve the B2B lead data and contact enrichment market. Adapt.io 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 Adapt.io and TheirStack for current information.
Frequently asked questions.
Frequently asked questions- Which is cheaper, Adapt.io or TheirStack?
- Both tools start free at $0 per month, so entry level pricing is tied. Adapt.io's Starter plan costs $49 per month and Basic costs $99 per month. TheirStack's API, Webhooks & MCP plan is also $49 per month for 1,500 API credits, while its App plan is usage based with credit packs from 1,000 to 200,000.
- What integrations does Adapt.io support?
- Adapt.io connects with Salesforce, HubSpot, Zoho CRM, Marketo, Outreach, and Zapier, for a total of 6 integrations. Zapier is the only integration it shares with TheirStack, while the other five are listed only by Adapt.io.
- What integrations does TheirStack support?
- TheirStack connects with Clay, LinkedIn Audiences, Make, N8N, and Zapier, for a total of 5 integrations. Only Zapier overlaps with Adapt.io's integration list, and the remaining four are listed only by TheirStack.
- Which tool has more features listed?
- Adapt.io lists 10 features total, including data enrichment with 50+ attributes and ABM list building. TheirStack lists 8 features, including job search, company search, and an MCP server. The two feature sets differ mainly in wording and focus rather than direct overlap.
- Who is TheirStack best suited for?
- TheirStack suits budget-conscious teams wanting an affordable data enrichment tool, teams that want to start free and scale as needs grow, and enterprise buyers who prefer custom pricing and dedicated support. It centers on job posting and technographics data for finding companies by hiring activity or tech stack.
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
Connect on LinkedIn →Explore more.
Ready to scale your outreach?
We build GTM engines that book real meetings. See the receipts.
Related articles.
11x vs Adapt.io: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare 11x (sales engagement platform) and Adapt.io (data enrichment tool). See pricing, features, and integrations to decide which one, or both, your stack needs.
Apollo.io vs Proofy: Data Enrichment Tool Comparison
Compare Apollo.io and Proofy side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
AroundDeal vs Leadspicker: Data Enrichment Tool vs Sales Engagement Platform Comparison
Compare AroundDeal (data enrichment tool) and Leadspicker (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
AroundDeal vs Salesflare: Data Enrichment Tool vs CRM Platform Comparison
Compare AroundDeal (data enrichment tool) and Salesflare (CRM platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Gong vs NeverBounce: Sales Engagement Platform vs Data Enrichment Tool Comparison
Gong vs NeverBounce: what Gong's own pages say about enrichment, what NeverBounce's API returns about an address, and how each vendor prices.
ContactOut vs Luru: Data Enrichment Tool vs Sales Engagement Platform Comparison
Compare ContactOut (data enrichment tool) and Luru (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.