Attio vs Seamless.AI: CRM Platform vs Data Enrichment Tool Comparison
Compare Attio (CRM platform) and Seamless.AI (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 organizing contacts, tracking deals, and forecasting revenue, while Seamless.AI is a data enrichment tool for finding accurate B2B contact data. Both start free, so the choice depends on workflow fit rather than price. Many teams use both together to cover CRM and prospecting needs.
Key takeaways
- Attio offers four pricing tiers: Free, Plus at $44/mo, Pro at $99/mo, and Enterprise with contact sales.
- Seamless.AI offers three pricing tiers: Free with 50 credits, Pro with annual credit packages, and Enterprise with custom packages.
- Attio lists eight key features including real-time contact syncing, custom objects, and Call Intelligence for recording meetings.
- Seamless.AI lists ten key features including real-time B2B contact search, email and cell phone lookups, and an AI writing assistant.
- Zapier is the only integration shared by both platforms, while Attio adds Slack and ChatGPT and Seamless.AI adds Salesforce and HubSpot.
Reviewed and updated September 2, 2026
Attio vs Seamless.AI: CRM Platform vs Data Enrichment Tool Comparison
Attio is a CRM platform; Seamless.AI is a data enrichment tool. Whether you need one, the other, or both depends on which part of the workflow you are buying for: customer relationship management and sales pipeline tracking on one side, B2B lead data and contact enrichment on the other. This guide lays out what each vendor publishes.
The Quick Answer
Attio is a CRM platform for customer relationship management and sales pipeline tracking; Seamless.AI 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 Seamless.AI lists real-time b2b contact search engine and email and cell phone lookups.
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 Seamless.AI. 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.
Seamless.AI is AI-powered sales lead platform with real-time contact search engine, pitch intelligence, and data enrichment for B2B prospecting.
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
Seamless.AI Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 50 Credits |
| Pro | Contact Sales | Annual Credit Packages |
| Enterprise | Contact Sales | Custom Packages |
Source: Seamless.AI 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.
Attio offers 4 pricing tiers compared to Seamless.AI's 3, giving you more granularity as you scale.
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
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- and 4 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
Seamless.AI Key Features
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- Autopilot list building (add-on)
- AI writing assistant
- Chrome extension
- Enterprise security and compliance
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 Seamless.AI
- Real-time B2B contact search engine
- Email and cell phone lookups
- Pitch intelligence
- Data enrichment
- Buyer intent data (add-on)
- Job changes tracking (add-on)
- Autopilot list building (add-on)
- AI writing assistant
- Chrome extension
- Enterprise security and compliance
Integration Ecosystem
Attio Integrations
Attio connects with: Typeform, Zapier, Slack, Aircall, Mailchimp, Segment, Asana, Pipedream, ChatGPT, Claude.
Seamless.AI Integrations
Seamless.AI connects with: Salesforce, HubSpot, Outreach, SalesLoft, Pipedrive, Microsoft Dynamics 365, 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 Seamless.AI: Salesforce, HubSpot, Outreach, SalesLoft, Pipedrive, Microsoft Dynamics 365.
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 Seamless.AI
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that need a wide feature set (10 capabilities listed)
- 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 | Seamless.AI |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Contact Sales |
| Total Features Listed | 8 | 10 |
| Integrations | 10 | 7 |
| Founded | N/A | 2015 |
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 Seamless.AI the B2B lead data and contact enrichment side. Attio offers a more accessible entry point, while Seamless.AI 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 Seamless.AI for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Attio and Seamless.AI?
- Attio is a CRM platform built for customer relationship management and sales pipeline tracking, while Seamless.AI is a data enrichment tool built for B2B lead data and contact enrichment. Attio focuses on organizing contacts and deals, while Seamless.AI focuses on finding accurate contact data for target accounts.
- Which is cheaper, Attio or Seamless.AI?
- Both platforms start at the same price point of $0 per month with free tiers. Beyond the free tier, Attio's Plus plan is $44 per month and Pro is $99 per month, while Seamless.AI's Pro and Enterprise plans require contacting sales for annual credit packages, so a direct paid comparison depends on usage needs.
- Do Attio and Seamless.AI integrate with each other or with the same tools?
- The only integration shared by both platforms is Zapier. Attio separately connects with Typeform, Slack, Aircall, Mailchimp, Segment, Asana, Pipedream, ChatGPT, and Claude, while Seamless.AI separately connects with Salesforce, HubSpot, Outreach, SalesLoft, Pipedrive, and Microsoft Dynamics 365.
- Can I use both Attio and Seamless.AI together?
- Yes, many teams run one of each since they serve different parts of the workflow. Attio handles CRM functions like organizing contacts, tracking deals, and forecasting revenue, while Seamless.AI handles finding accurate contact data for target accounts, so they can complement rather than compete with each other.
- Who should choose Attio over Seamless.AI?
- Attio best fits budget-conscious teams needing an affordable CRM, organizations with complex tech stacks requiring broad integration support with 10 integrations, teams wanting to start free and scale, and enterprise buyers who prefer custom pricing and dedicated support.
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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