PolyAI alternatives

Enterprise voice agents. Context heavily runtime-injected from CRM / telephony / API / user history; passes context to humans on escalation. Strong on plumbing, lighter on autonomous memory accumulation. Full PolyAI record →

  1. 1 Replicant Vertical / domain-specific AI memory

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ? Compare with PolyAI →

  2. 2 Convai (Mimir) Vertical / domain-specific AI memory

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed

    OSS ? Self-host ✓ Managed ✓ MCP ? Compare with PolyAI →

  3. 3 Letta / MemGPT Dedicated memory layers

    same storage (kv) · same retrieval (injection, agentic) · same memory unit (fact) · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 3.7k released 2026-10-29 Apache-2.0 Compare with PolyAI →

  4. 4 Cresta Vertical / domain-specific AI memory

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ? Compare with PolyAI →

  5. 5 Replika Vertical / domain-specific AI memory

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed

    OSS ? Self-host — Managed ✓ MCP ? Compare with PolyAI →

  6. 6 Sanctuary AI Carbon (Phoenix Gen 7/8) Vertical / domain-specific AI memory

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (agentic) · same memory unit (fact)

    OSS ? Self-host — Managed — MCP ? Compare with PolyAI →

  7. 7 Cognigy (now NiCE Cognigy) Vertical / domain-specific AI memory ⚠ acquired — acquired by NiCE; now NiCE Cognigy

    also in Vertical / domain-specific AI memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed · also has MCP

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with PolyAI →

  8. 8 Google Gemini Memory Platform-provider memory

    same storage (kv) · same retrieval (injection) · same memory unit (fact) · also offered managed · also has MCP

    OSS ? Self-host — Managed ✓ MCP ✓ Compare with PolyAI →

Ranked by shared memory design (storage, retrieval, conflict handling, memory unit), same section and shared must-haves (open source, self-hosting, MCP), with adoption as a tie-breaker. ✓ confirmed · — no · ? not in the catalog yet. Want picks for your own requirements? Use the chooser. Checking a whole project? Check your stack.