B2B contact database plus sales engagement and AI prospecting platform.
Clay vs Seamless.AI
Features, pricing, strengths and trade-offs — and which one fits your situation.
The verdict
Summary
Clay is best for gTM and RevOps teams building custom enrichment and research workflows for outbound, while Seamless.AI is best for sales reps who mainly need verified emails and mobile numbers for prospecting. Only Seamless.AI offers dialer / calling. Clay has a high learning curve, compared with low for Seamless.AI. Both Clay and Seamless.AI offer a free plan, so you can try each before paying.
Which should you choose?
Choose Clay if…
- You need gTM and RevOps teams building custom enrichment and research workflows for outbound
- You're one of: revops and growth teams, outbound agencies, technical founders building lead lists
- Higher match rates by combining many data sources
Choose Seamless.AI if…
- You need sales reps who mainly need verified emails and mobile numbers for prospecting
- Dialer / calling matters to you
- You're one of: sdrs doing phone prospecting, recruiters, sales teams needing contact enrichment
- You want something quicker to learn
At a glance
| Clay | Seamless.AI | |
|---|---|---|
| Best for | GTM and RevOps teams building custom enrichment and research workflows for outbound | Sales reps who mainly need verified emails and mobile numbers for prospecting |
| Free plan | Yes | Yes |
| Starting price | From $149/mo | From $147/mo |
| Learning curve | High | Low |
| Platforms | Web, Chrome extension, API | Web, Chrome extension, API |
| Ideal for | RevOps and growth teams, Outbound agencies, Technical founders building lead lists | SDRs doing phone prospecting, Recruiters, Sales teams needing contact enrichment |
Feature comparison
| Clay | Seamless.AI | |
|---|---|---|
| B2B contact database | Via 100+ data providers | 1.3B+ contacts |
| Email sequences | Yes | Limited |
| Email warm-up | — | — |
| Unlimited sending accounts | — | — |
| LinkedIn steps | — | Chrome extension (prospecting only) |
| Built-in CRM | No | No |
| AI personalization | Yes | Yes |
| Dialer / calling | No | Yes |
| Email verification | Via integrated providers | Yes |
IncludedLimited / higher plansNot available— Not confirmed
Security & enterprise
| Clay | Seamless.AI | |
|---|---|---|
| Business / enterprise plan | Yes | Yes |
| SSO (SAML / OIDC) | Enterprise plan | Yes |
| SCIM user provisioning | — | — |
| SOC 2 | Type II | Type II |
| ISO 27001 | — | No |
| HIPAA (BAA available) | — | — |
| GDPR DPA | Yes | — |
| Data residency options | — | — |
| No training on your data | — | — |
| Audit logs | — | — |
| Admin controls | Enterprise plan | Yes |
| Deployment | Cloud | Cloud |
From each vendor's security documentation. "—" = not confirmed. What to ask vendors · Compare all tools
What each tool does
Clay
Clay is a spreadsheet-style data enrichment platform that pulls from 100+ data providers using waterfall enrichment and uses its Claygent AI agent to research companies and leads on the web. Enriched data can be scored, used to write personalized messages, and pushed to CRMs or sending tools, or sent through Clay's own Sequencer. It is used by growth teams, RevOps and outbound agencies.
Key features- Waterfall enrichment across 100+ data providers
- Claygent AI agent for web research and data extraction
- Spreadsheet-style tables with formulas and AI columns
- Built-in Sequencer for multi-step email campaigns
- Native pushes to Smartlead, Instantly, Outreach and HubSpot
- CRM sync back to Salesforce and HubSpot on Growth plan and up
Seamless.AI
Seamless.AI is a B2B contact data platform that searches for and verifies emails and phone numbers in real time. It includes a Chrome extension for LinkedIn and company sites, Autopilot for background list building, an AI Writer, and an engagement hub for emailing and calling. It is used by SDRs, recruiters and sales teams focused on phone and email prospecting.
Key features- Real-time contact search with verified emails and mobile numbers
- Chrome extension that overlays contact data on LinkedIn and websites
- Autopilot for automated list building
- AI Writer for cold emails and sales copy
- Buyer intent signals and data enrichment
- Connect engagement hub with emailing, calling and tasks
Pricing
Clay
Free plan: yes (limited credits). Paid from ~$149/mo
Seamless.AI
Free plan (50 lifetime credits); Basic ~$147/mo billed yearly; Pro/Enterprise quote-only
Prices last checked September 2026. Plans change often — confirm on each vendor's site.
Pros and cons
Clay
Strengths- Higher match rates by combining many data sources
- Very flexible for custom research and scoring
- Connects to most sending tools and CRMs
- Free plan to learn the product
- Steep learning curve for non-technical users
- Credit-based usage can become expensive at scale
- No built-in dialer or CRM
- Deliverability tooling is lighter than dedicated cold email senders
Not ideal for: Reps who want a simple point-and-click prospecting database should start with Apollo.io or Hunter.io.
Seamless.AI
Strengths- Large database with many mobile numbers
- Chrome extension fits a LinkedIn-first workflow
- Free plan to test data quality
- CRM enrichment keeps records up to date
- Free plan credits are lifetime, not monthly
- Higher tiers are quote-only and require annual contracts
- Outreach features are basic compared with dedicated sequencers
- Data accuracy complaints are common, so bounce rates vary
Not ideal for: Teams that want sequencing and deliverability tools in the same product should look at Apollo.io or lemlist.
Integrations
Clay
Seamless.AI
FAQ
What is the main difference between Clay and Seamless.AI?
Clay is built for gTM and RevOps teams building custom enrichment and research workflows for outbound; Seamless.AI is built for sales reps who mainly need verified emails and mobile numbers for prospecting. Key differences: Seamless.AI offers dialer / calling.
Is Clay or Seamless.AI cheaper?
Clay starts from $149/mo and Seamless.AI starts from $147/mo (as of September 2026). On entry price, Seamless.AI is cheaper — but compare what each plan includes, since limits differ. Always confirm current pricing on each vendor's site.
Do Clay and Seamless.AI have free plans?
Both Clay and Seamless.AI offer a free plan, so you can try each before paying.
Which is easier to use, Clay or Seamless.AI?
Seamless.AI is generally quicker to learn (Clay: high, Seamless.AI: low learning curve).
What are good alternatives to Clay and Seamless.AI?
Other sales & outreach tools worth comparing include Apollo.io, Instantly.ai and HubSpot.
