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.