Voiceflow Memory

https://www.voiceflow.com/docs/documentation/build/behaviour

Agent platform. Keeps a configurable window of recent turns (default 50, range 10–100) in the {vf_memory} variable; older turns are summarized rather than dropped. Chat projects can persist history indefinitely or clear it on tab close/refresh.

Active · Verified 2026-10-23 · fresh as of 2026-10-23 · 51 cited facts, 3 with a third-party source · 2 recorded changes · Suggest a correction

At a glance

Tier
T1
Latest release
not applicable — not OSS fix
License
not applicable — not OSS fix
GitHub
not applicable — no GitHub repo fix
Freshness
2026-10-23 fix
Layer
agent-infra repo fix
Licensing
commercial vendor fix
Deployment locus
cloud vendor fix
Platform vs product
platform vendor fix
SDK languages
rest vendor fix
Protocols
mcp-client, mcp-server vendor fix

Memory taxonomy

storage
kv
retrieval
injection
persistence
session
update
overwrite
unit
fact
governance
user-controllable
conflict
last-write-wins

When to use

Optimised for: low-code chatbot designer + sliding-window buffer

Anti-fit: not for code-first developers

Pros & cons

Pros

Built specifically for voice agents — memory model accommodates dialogue flow control and slot-filling, which generic memory layers don't.

Cons

Voice-agent-tied; not useful for non-voice agentic apps.

Claims & capabilities

Pricing not published: free trial (no card) with usage-based billing for agencies/partners; businesses request a quote.

Technical surface

API surface
searched not found
Backend storage
searched not found
Deployment
Managed-only
Embedding model
searched not found
Multi-tenancy
searched not found
MCP
yes — MCP tool lets agents call tools on remote MCP servers; Voiceflow also hosts an MCP server (mcp.voiceflow.com) for managing projects from AI clients
A2A
searched not found
OpenTelemetry
searched not found

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, 3 third-party)

Each fact links to the page it came from; the badge says who published it (how to read sources).

What changed

Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)

  1. 2026-10-23
    • Homepage “https://docs.voiceflow.com/docs/memory” → “https://www.voiceflow.com/docs/documentation/build/behaviour”
    #223
  2. 2026-10-22
    • Pricing “Free + paid” → “Free trial + usage-based billing for agencies/partners; business pricing on request” source
    • MCP support first recorded as “yes — MCP tool lets agents call tools on remote MCP servers; Voiceflow also hosts an MCP server (mcp.voiceflow.com) for managing projects from AI clients” source
    #219