Reference
Framework Comparison
JamJet vs LangGraph vs CrewAI vs AutoGen vs Google ADK — feature matrix across execution, durability, observability, eval, and scale.
Last updated: 2026-06-04 · Corrections welcome
✓ Built-in⚙ Via plugin~ Partial— Not supported… In progress
- Plain Python — fastest start, lowest guarantees. Great for prototypes and one-off scripts.
- LangGraph — graph orchestration, familiar patterns, optional durability via checkpointers.
- JamJet — Python mental model with durability by default and stronger runtime guarantees.
- CrewAI / AutoGen — useful abstractions for some multi-agent patterns, but different emphasis on reliability.
- Google ADK — tight Gemini integration, co-developed A2A, fast-moving with strong Google Cloud support. Best for teams building on Google's AI stack.
If you like LangGraph's Python workflow model but want durability, replay, typed validation, and runtime-enforced limits built in, JamJet is the closest conceptual move. See the LangGraph migration guide.
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| Graph-based workflow | ✓ | ✓ | ~ Sequential/hierarchical | ✓ | ✓ Sequential, parallel, loop agents |
| Async execution | ✓ | ✓ | ✓ | ✓ | ✓ |
| Local in-process runner | ✓ | ✓ | ✓ | ✓ | ✓ |
| Typed state | ✓ Pydantic | ~ TypedDict | — Dict | ~ Dict | ~ |
| State validation at every step | ✓ | — | — | — | — |
| Conditional routing | ✓ Inline predicates | ✓ Edge functions | ~ Process type | ✓ | ✓ |
| Parallel branches | ✓ type: parallel | ✓ | — | ✓ | ✓ |
| Cycle / loop support | ✓ | ✓ | ~ | ✓ | ✓ |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| Durable execution (crash recovery) | ✓ Rust runtime | ⚙ Checkpointers | — | — | — |
| Event sourcing | ✓ Native | — | — | — | — |
| Automatic retry with backoff | ✓ YAML config | ⚙ Manual | ⚙ Manual | ⚙ Manual | ~ Manual |
| Human-in-the-loop / pause | ✓ type: wait | ✓ interrupt_before | — | ~ | ✓ |
| Resume from any checkpoint | ✓ | ⚙ Requires saver | — | — | — |
| Timeout per step | ✓ | ~ | — | ~ | ~ |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| Structured event log | ✓ Per-step events | ~ Callbacks | ~ verbose text | ~ | ✓ |
| Execution inspection CLI | ✓ jamjet inspect | — | — | — | — |
| Event timeline | ✓ | — | — | — | — |
| OpenTelemetry tracing | … | ⚙ LangSmith | ⚙ | — | ✓ Built-in |
| Time-travel debugging | … | — | — | — | — |
| Token/cost attribution | ✓ | — | — | — | ✓ |
| Web inspector/dashboard | ✓ Web Companion | — | — | — | ✓ ADK Web UI |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| MCP client (use any MCP server) | ✓ Native | ⚙ Via adapter | ⚙ Via adapter | ⚙ Via adapter | ✓ Native |
| MCP server (expose your tools) | … | — | — | — | — |
| A2A cross-agent calls | ✓ Client + server | — | — | — | ✓ Co-developed spec |
| OpenAI function calling | ✓ | ✓ | ✓ | ✓ | ✓ |
| Custom Python tools | ✓ @tool decorator | ✓ | ✓ | ✓ | ✓ |
| Tool retry on error | ✓ Node-level config | ⚙ Manual | ⚙ Manual | ⚙ Manual | ~ |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| Built-in eval harness | ✓ | — | — | — | ✓ pytest-based |
| LLM-as-judge scoring | ✓ LlmJudgeScorer | — | — | — | — |
| Assertion scoring | ✓ AssertionScorer | — | — | — | — |
| Latency budgets | ✓ LatencyScorer | — | — | — | — |
| Cost budgets | ✓ CostScorer | — | — | — | — |
| Dataset replay | ✓ | — | — | — | ~ |
| CI exit code on regression | ✓ --fail-under | — | — | — | ~ |
| Eval as a workflow node | ✓ type: eval | — | — | — | — |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| YAML workflow authoring | ✓ | — | — | — | — |
| Python decorator API | ✓ @wf.step | ✓ | ✓ | ✓ | ✓ |
| Project templates | ✓ jamjet init --template | — | — | — | — |
| Local dev server | ✓ jamjet dev | — | — | — | — |
| Workflow validation CLI | ✓ jamjet validate | — | — | — | — |
| Multi-model support | ✓ Any OpenAI-compat | ✓ | ✓ | ✓ | ~ Primarily Gemini |
| Local models (Ollama, etc.) | ✓ | ✓ | ✓ | ✓ | ~ |
| Feature | JamJet | LangGraph | CrewAI | AutoGen | Google ADK |
|---|
| Runtime language | Rust | Python | Python | Python | Python |
| Polyglot SDK | Python, TS, Java | Python, JS | Python | Python, .NET | Python |
| Kubernetes-ready | ✓ Stateless binary | ⚙ | ⚙ | ⚙ | ⚙ |
| Managed cloud offering | ✓ JamJet Cloud | ✓ LangGraph Cloud | — | — | ✓ Vertex AI |
| Streaming | ✓ | ✓ | ~ | ✓ | ✓ |
| Open source | ✓ Apache-2.0 | ✓ MIT | ✓ MIT | ✓ CC-BY-4 | ✓ Apache-2.0 |
note:
See Benchmarks for measured latency comparisons with methodology and raw results. Migration guides: from LangGraph, from CrewAI, from OpenAI SDK.
Complete HTTP API reference for the JamJet runtime — workflows, executions, agents, work items, audit, and tenants.
JamJet terminology — Span, Agent, Approval, Engram, MCP, A2A, and more.