Attio vs TheirStack: CRM Platform vs Data Enrichment Tool Comparison
Compare Attio (CRM platform) and TheirStack (data enrichment tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Attio is a CRM platform for customer relationship management and sales pipeline tracking, while TheirStack is a data enrichment tool for finding B2B lead data and contact information. Both start free, with Attio at $44/mo for its Plus plan and TheirStack at $49/mo for API access. They solve different problems, and many teams use both together.
Key takeaways
- Attio's Free plan supports up to 3 seats, and its Plus plan costs $44/mo for up to 10 seats.
- TheirStack's Free plan includes 50 company credits and 200 API credits per month, with an API, Webhooks and MCP plan at $49/mo for 1,500 API credits.
- Attio lists 10 integrations including Typeform, Zapier, Slack, Aircall, and Mailchimp, while TheirStack lists 5 integrations including Clay, LinkedIn Audiences, Make, and N8N.
- Both platforms list 8 features each on their own pages, and both share Zapier as a common integration.
- TheirStack was founded in 2021, while Attio's founding year is not listed.
Reviewed and updated September 4, 2026
Attio vs TheirStack: CRM Platform vs Data Enrichment Tool Comparison
Sales teams building an outbound stack often weigh Attio, a CRM platform for customer relationship management and sales pipeline tracking, against TheirStack, a data enrichment tool for B2B lead data and contact enrichment. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
Attio is a CRM platform for customer relationship management and sales pipeline tracking; TheirStack is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, Attio lists real-time contact syncing and automatic data enrichment, and TheirStack lists job search and company search.
Both start at the same price point ($0/mo), so the decision comes down to features and workflow fit.
If your priority is organizing contacts, tracking deals, and forecasting revenue, Attio is the one built for it; for finding accurate contact data for target accounts, that is TheirStack. Many teams run one of each.
Understanding the Core Difference
Attio is Attio is a CRM that syncs contacts and email in real time and lets teams model their own objects, workflows and reports on top of that data. It is sold in Free, Plus, Pro and Enterprise plans priced per user.
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
Attio Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | Up to 3 seats |
| Plus | $44/mo | Up to 10 seats |
| Pro | $99/mo | - |
| Enterprise | Contact Sales | - |
Source: Attio 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
- Real-time contact syncing
- Automatic data enrichment
- Custom objects and custom relationship attributes
- Workflows and integration blocks
- Sequences for personalized outreach
- Call Intelligence to record and analyze meetings
- and 2 more listed below
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- and 2 more listed below
Attio Key Features
- Real-time contact syncing
- Automatic data enrichment
- Custom objects and custom relationship attributes
- Workflows and integration blocks
- Sequences for personalized outreach
- Call Intelligence to record and analyze meetings
- Reporting and insights in real time
- API and webhook access with an app SDK and MCP server
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 Attio
- Real-time contact syncing
- Automatic data enrichment
- Custom objects and custom relationship attributes
- Workflows and integration blocks
- Sequences for personalized outreach
- Call Intelligence to record and analyze meetings
- Reporting and insights in real time
- API and webhook access with an app SDK and MCP server
Listed only by TheirStack
- Job search
- Company search
- Company lookup
- Enrichment
- Exports
- Email alerts
- Webhooks
- MCP server
Integration Ecosystem
Attio Integrations
Attio connects with: Typeform, Zapier, Slack, Aircall, Mailchimp, Segment, Asana, Pipedream, ChatGPT, Claude.
TheirStack Integrations
TheirStack connects with: Clay, LinkedIn Audiences, Make, N8N, Zapier.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by Attio: Typeform, Slack, Aircall, Mailchimp, Segment, Asana, Pipedream, ChatGPT, Claude.
Integrations listed only by TheirStack: Clay, LinkedIn Audiences, Make, N8N.
Use Case Recommendations
Best Fit for Attio
- Budget-conscious teams looking for an affordable CRM platform
- Organizations with complex tech stacks needing broad integration support (10 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 | Attio | TheirStack |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 8 | 8 |
| Integrations | 10 | 5 |
| Founded | N/A | 2021 |
Getting Started Checklist
- Define your customer relationship management and sales pipeline tracking and B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected contacts and deals and 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
Attio serves the customer relationship management and sales pipeline tracking side of an outbound stack and TheirStack the B2B lead data and contact enrichment side. Attio 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 Attio and TheirStack for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between Attio and TheirStack?
- Attio is a CRM platform built for customer relationship management and sales pipeline tracking, letting teams sync contacts in real time and model custom objects and workflows. TheirStack is a data enrichment tool focused on B2B lead data, finding companies by technology use and hiring activity, and enriching company lists with technographics and buying intent.
- How much does Attio cost compared to TheirStack?
- Both tools start free. Attio's paid tiers are Plus at $44/mo for up to 10 seats and Pro at $99/mo, with Enterprise requiring contact with sales. TheirStack offers a usage-based App plan with credit packs, an API, Webhooks and MCP plan at $49/mo for 1,500 API credits, and a Datasets tier requiring contact with sales.
- Do Attio and TheirStack integrate with the same tools?
- They share only one listed integration, Zapier. Attio also connects with Typeform, Slack, Aircall, Mailchimp, Segment, Asana, Pipedream, ChatGPT, and Claude, while TheirStack connects with Clay, LinkedIn Audiences, Make, and N8N.
- Should I use Attio, TheirStack, or both?
- It depends on your workflow needs. Attio fits teams organizing contacts, tracking deals, and forecasting revenue, while TheirStack fits teams focused on finding accurate contact data for target accounts. The article notes that many teams run one of each since they cover different parts of the outbound workflow.
- Which tool has more integrations, Attio or TheirStack?
- Attio lists 10 integrations, while TheirStack lists 5. This makes Attio a better fit for organizations with complex tech stacks that need broad integration support, according to the article's use case recommendations.
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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