Stack AI
Acquired by Asana (completed 2026-05-28); continues as its own product and brand. Connects enterprise knowledge sources (SharePoint, Confluence, Notion, Drive, DBs) as memory layer with access controls, versioning, citations. Agents query at runtime; no separate session/cross-session store.
Acquired · Verified 2026-10-29 · fresh as of 2026-10-29 · 51 cited facts, 7 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Enterprise-KB RAG (no agent memory store) vendor fix
- Tier
- T2
- Section
- Framework-embedded memory
- Created
- 2022 (founded 2022 by Bernard Aceituno and Toni Rosinol; YC S23) third-party fix
- Latest release
- not applicable — not OSS fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Free $0 (500 runs/mo, 2 projects, 1 seat); Enterprise custom vendor fix
- Funding
- $16.6M total (Series A 2025 from Lobby Capital; YC W23); acquired by Asana (completed 2026-05-28, terms undisclosed) third-party fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
- Protocols
- mcp-server vendor fix
- Compliance
- gdpr, hipaa, iso27001, soc2-type2 vendor fix
Memory taxonomy
- storage
- vector
- retrieval
- similarity
- persistence
- long-term
- update
- overwrite
- unit
- document
- governance
- auditable
- conflict
- n/a
When to use
Optimised for: enterprise KB connectors + access controls + citations
Anti-fit: not for agent-state memory; this is enterprise-KB RAG only
Pros & cons
Pros
No-code agent platform with memory integrated; fastest path for non-engineers.
Cons
Memory abstractions are simple; sophisticated agents hit ceilings quickly.
Claims & capabilities
Free tier; Enterprise custom.
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- Multi-tenant cloud, VPC, or on-premise (Enterprise)
- Embedding model
- searched not found
- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
Alternatives to Stack AI → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other framework-embedded memory in the catalog, ranked by inbound references.
- Spring AI ChatMemory T3
Wraps conversation memory behind an Advisor abstraction. MessageWindowChatMemory default 20-msg sliding window (preserves system messages); pluggable ChatMemoryRepository backends (in-memory, JDBC, Cassandra, Neo4j). Memory injected as cross-cutting concern at the ChatClient level.
- Flowise Memory T1
Discontinued: Flowise (acquired by Workday, Aug 2025) was sunset in 2026 — code freeze 2026-07-29, GitHub repo archived 2026-08-13, end of life 2026-08-31. Was a visual LangChain canvas with LangChain-native memory nodes (Buffer, Buffer Window, Conversation Summary Buffer) backed by an internal chat_message DB table; Buffer Window kept the last K interactions, Summary Buffer compressed older turns while keeping recent ones verbatim.
- LangGraph Persistence T2
Distinct from LangMem. Built-in checkpointer saves graph state per super-step (short-term, thread-scoped). Store System adds long-term hierarchical key-value memory across threads with optional vector search + TTL. Postgres / Mongo / Redis stores for production.
- AutoGen Memory T2
AutoGen's memory layer: ListMemory chronological context plus teachable agents that vectorise corrections; integrates with Mem0/Zep rather than building deep memory natively. Microsoft AutoGen is in maintenance mode (community managed, bug and security fixes only), and Microsoft points new projects to Microsoft Agent Framework.
- CrewAI Memory T2
Memory subsystem inside the CrewAI orchestration framework; integrates with Mem0 for the long-term tier.
- Hermes Agent memory (Nous Research) T3
Nous Research's open-source self-improving agent keeps an agent-curated MEMORY.md/USER.md notebook injected at session start, full-text (FTS5) search over past sessions that returns raw messages without LLM summarisation, and optional Honcho user modelling. one of the most-starred agent projects of 2026.
Sources (50 cited facts, 7 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Enterprise-KB RAG (no agent memory store) vendor
- What it does & what's distinct Acquired by Asana (completed 2026-05-28); continues as its own product and brand. Connec… third-party
- Claims / benefits Free tier; Enterprise custom. vendor
- Modalities text vendor
- Created 2022 (founded 2022 by Bernard Aceituno and Toni Rosinol; YC S23) third-party
- Mindshare 1 press ~20 (small star jobs vendor
- Funding $16.6M total (Series A 2025 from Lobby Capital; YC W23); acquired by Asana (completed 20… third-party
- Customers / scale HP, SmartAsset, Red Bull, IBM among named customers; 200+ enterprise customers in first … third-party
- Pricing Free $0 (500 runs/mo, 2 projects, 1 seat); Enterprise custom vendor
- Compliance SOC 2 Type II; HIPAA; GDPR-compliant vendor
- Data handling SOC 2 Type II; HIPAA; GDPR; on-premise deploy available on Enterprise tier; enterprise d… vendor
- Deployment Multi-tenant cloud, VPC, or on-premise (Enterprise) vendor
- HQ US third-party
- Founders / pedigree Stack AI (Bernardo Aceituno & Antoni Rosinol, co-founders; MIT / CMU; YC W23) third-party
- Memory volume / scale no scale claim — enterprise SaaS KB; undisclosed vendor
- Tombstoning soft-delete only vendor
- Schema evolution schema with migration vendor
- Namespace primitives per-tenant vendor
- Webhooks / events webhooks supported vendor
- Import / export JSON via REST; CSV/Sheets/Notion/Drive/S3 connectors vendor
- Integration count 0 vendor
- Orchestration single-agent (per-project flow; multi-agent via sub-flows) vendor
- Programmatic control declarative config (no-code) + REST vendor
- Pricing specifics tier flat-rate: Free + Enterprise custom vendor
- Agent abstraction DAG (visual workflow) + ReAct vendor
- Memory primitives file (enterprise data sources as memory layer; no separate session/cross-session store) vendor
- LLM lock multi-vendor vendor
- Runtimes declarative cross-language vendor
- Session handling stateless (runtime querying enterprise sources) vendor
- Validated verticals internal IT, knowledge management, enterprise compliance vendor
- Time to running <10min (hosted SaaS) vendor
- Anti-fit not for agent-state memory; this is enterprise-KB RAG only vendor
- Optimised for enterprise KB connectors + access controls + citations vendor
- Adjacent infrastructure BYO LLM; managed connectors vendor
- Pros No-code agent platform with memory integrated; fastest path for non-engineers. vendor
- Cons Memory abstractions are simple; sophisticated agents hit ceilings quickly. vendor
- Project & sources stackai.com vendor
- cost-input-usd-per-mtok 0 vendor
- cost-output-usd-per-mtok 0 vendor
- cost-tier free vendor
- cost-pricing-model free-tier vendor
- cost-last-verified 2026-06-29 vendor
- adoption-accelerator yc-w23 third-party
- architecture-deployment-locus cloud vendor
- licensing-bucket commercial vendor
- positioning-platform-vs-product platform vendor
- taxonomy-three-layer-rollup agent-infra repo
- compliance-certifications gdpr,hipaa,iso27001,soc2-type2 vendor
- sdk-languages rest vendor
- protocol-support mcp-server vendor
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-23
- Funding / ownership “$16.6M total; Series A 2025 from Lobby Capital; YC W23” → “$16.6M total (Series A 2025 from Lobby Capital; YC W23); acquired by Asana (completed 2026-05-28, terms undisclosed)” source
- 2026-10-22
- Pricing “Free + paid” → “Free $0 (500 runs/mo, 2 projects, 1 seat); Enterprise custom” source
- Deployment “Both” → “Multi-tenant cloud, VPC, or on-premise (Enterprise)” source