Retell AI alternatives

Voice agents. Short-term context within call native; long-term memory via webhook integration to CRM / external DB. Cross-agent memory sharing in multi-agent setups. Full Retell AI record →

  1. 1 CrewAI Memory Framework-embedded memory

    also in Framework-embedded memory · same storage (kv, vector) · same retrieval (injection, similarity) · same memory unit (episode, fact) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 51k released 2026-10-14 MIT Compare with Retell AI →

  2. 2 smolagents Memory Framework-embedded memory

    also in Framework-embedded memory · same storage (kv) · same retrieval (injection) · same memory unit (episode) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 29k released 2026-05-29 Apache-2.0 Compare with Retell AI →

  3. 3 OpenAI Agents SDK Memory Framework-embedded memory

    also in Framework-embedded memory · same storage (kv, vector) · same retrieval (injection, similarity) · same memory unit (episode, fact) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 29k released 2026-10-15 MIT Compare with Retell AI →

  4. 4 Google ADK Memory Framework-embedded memory

    also in Framework-embedded memory · same storage (kv, vector) · same retrieval (injection, similarity) · same memory unit (episode, fact) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 21k released 2026-08-07 Apache-2.0 Compare with Retell AI →

  5. 5 Pydantic-AI + Hindsight Framework-embedded memory

    also in Framework-embedded memory · same storage (vector) · same retrieval (similarity) · same memory unit (episode) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 20k released 2026-04-15 MIT Compare with Retell AI →

  6. 6 LangMem (LangChain) Framework-embedded memory

    also in Framework-embedded memory · same storage (kv, vector) · same retrieval (injection, similarity) · same memory unit (episode, fact) · also self-hostable · also offered managed · also has MCP

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 1.6k released 2025-10-27 MIT Compare with Retell AI →

  7. 7 Vapi (voice agents) Framework-embedded memory

    also in Framework-embedded memory · same storage (kv) · same retrieval (injection) · same memory unit (fact) · also self-hostable · also offered managed · also has MCP

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Retell AI →

  8. 8 AGiXT Adaptive Memory Framework-embedded memory

    also in Framework-embedded memory · same storage (vector) · same retrieval (similarity) · same memory unit (episode, fact) · also self-hostable · also offered managed

    OSS ✓ Self-host ✓ Managed ✓ MCP ? ★ 3.2k released 2026-04-08 MIT Compare with Retell AI →

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.