11x vs Seamless.AI
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose 11x if you want ai digital workers for outbound sales prospecting and voice outreach (Supervised agent, enterprise); choose Seamless.AI if you want real-time b2b contact search engine with ai prospecting and outreach (Assistant, freemium).
| 11x | Seamless.AI | |
|---|---|---|
| What it is | AI digital workers for outbound sales prospecting and voice outreach | Real-time B2B contact search engine with AI prospecting and outreach |
| Type | agent | product-with-agents |
| Autonomy | Supervised agent | Assistant |
| Pricing | enterprise · $3,750/mo (Alice Growth, billed annually) | freemium · Free tier (limited lifetime credits); Basic reportedly ~$147/mo; Pro and Enterprise quote-based |
| Best for | mid-market, enterprise | smb, mid-market, enterprise |
| Deployment | saas | saas, api |
| Modalities | text, email, voice | text, email, voice, browser, api |
| Models | proprietary | proprietary |
| Protocols | function-calling, rest-api | rest-api |
| Integrations | HubSpot, Salesforce, Slack, G2, Gmail | Salesforce, HubSpot, Salesloft, Outreach, Pipedrive, LinkedIn |
| Capabilities | 4 documented | 5 documented |
11x
- +Consolidates research, list-building, multi-channel sending, reply handling, and meeting booking into one platform with CRM sync
- +Offers both outbound text/email (Alice) and AI voice agents (Julian, Mike)
- +Unified API and webhooks across workers for triggering actions from your own stack
- -TechCrunch reported in March 2025 that 11x had been claiming customers it does not have, with former employees alleging inflated ARR and high churn; 11x disputed parts and stated a retention figure (reported allegations, not adjudicated facts)
- -Pricing is high and largely opaque, with annual contracts and an entry plan in the tens of thousands per year
Seamless.AI
- +Fast, self-serve real-time contact lookup with a free tier and a Chrome extension over LinkedIn
- +Credit-back guarantee on invalid emails per its homepage
- +All-in-one: search, enrichment, intent signals, and built-in email/calling in one platform
- -Data accuracy and bounce rates are a recurring complaint in user reviews
- -Pro and Enterprise pricing is gated behind a demo, and credit consumption can inflate real cost
Which should you choose?
11x is ai digital workers for outbound sales prospecting and voice outreach, best for mid-market, enterprise. Seamless.AI is real-time b2b contact search engine with ai prospecting and outreach, best for smb, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced 11x and Seamless.AI profiles. Open either profile to review its evidence and last-reviewed date.