Opera AI (formerly Aria) alternatives

Memory feature stores user-declared preferences and facts; injected into future prompts. Understands current tab content; manages open tabs contextually. Memory off by default, end-user controlled, stored alongside the prompt rather than the LLM. Full Opera AI (formerly Aria) record →

  1. 1 Letta / MemGPT Dedicated memory layers

    same storage (kv) · same retrieval (injection) · 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 Opera AI (formerly Aria) →

  2. 2 CrewAI Memory Framework-embedded memory

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

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 51k released 2026-10-14 MIT Compare with Opera AI (formerly Aria) →

  3. 3 LangGraph Persistence Framework-embedded memory

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

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 43k released 2026-10-16 MIT Compare with Opera AI (formerly Aria) →

  4. 4 OpenAI Agents SDK Memory Framework-embedded memory

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

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 29k released 2026-10-15 MIT Compare with Opera AI (formerly Aria) →

  5. 5 Google ADK Memory Framework-embedded memory

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

    OSS ✓ Self-host ✓ Managed ✓ MCP ✓ ★ 21k released 2026-08-07 Apache-2.0 Compare with Opera AI (formerly Aria) →

  6. 6 Devin (Cognition) Coding-agent memory

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

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Opera AI (formerly Aria) →

  7. 7 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 Opera AI (formerly Aria) →

  8. 8 Mistral Le Chat — Memories (now Vibe) Platform-provider memory ⚠ renamed — now Vibe

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

    OSS ? Self-host ✓ Managed ✓ MCP ✓ Compare with Opera AI (formerly Aria) →

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.