Open-source LLM app & AI-agent builder — visual workflows, RAG pipelines and tool-calling agents.
Tool useMemoryMulti-agentRAG
Fixie vs Sakana AIwhich AI ops agent should you pick in 2026?
Build durable agents that act on your internal data — open framework.
Tool useRAGMemoryMulti-agent
Fixie vs Sakana AI — specs
| Spec | Fixie | Sakana AI |
|---|---|---|
| Agent Rank | 73 / 100 (A) | 63 / 100 (B) |
| Autonomy | Semi-autonomous | Autonomous |
| Pricing | Free · OSS | Subscription |
| Open source | Yes | No |
| Capabilities | Tool use, RAG, Memory, Multi-agent | Tool use, Memory, RAG, Multi-agent |
| Integrations | 3 apps | 3 apps |
| Verified | — | — |
| Released | Feb 2025 | Sep 2025 |
Agent Rank breakdown
Fixie
Agent Rank
73/ 100
- Autonomy
- 8
- Capabilities
- 8
- Integrations
- 6
- Pricing
- 10
- Polish
- 6
- Verifiability
- 6
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Sakana AI
Agent Rank
63/ 100
- Autonomy
- 9
- Capabilities
- 8
- Integrations
- 4
- Pricing
- 4
- Polish
- 7
- Verifiability
- 6
Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?
Pros & cons
Fixie
Pros
- +Real multi-agent primitives — planner + workers + reviewer out of the box
- +Strong for internal-tool agents over your own data
- +Permissive license; auditable end-to-end
Cons
- −Framework, not a finished product — engineering effort to ship anything
- −Smaller community than LangChain / LlamaIndex
- −Cloud pricing not yet published — usage-based and opaque
Sakana AI
Pros
- +$135M Series B Nov 2025 at $2.65B valuation — Japan's breakout agent player
- +Production at MUFG, SMFG + Japan defense (ATLA contract)
- +Native Japanese-language strength — top of "AI エージェント" SERPs
Cons
- −Enterprise sales motion only — no self-serve
- −US/EU presence early stage; brand recognition mostly in APAC
- −Limited public benchmarks vs Western multi-agent competitors
Pricing
Fixie
Open source
Free
Builders
- +Apache-2.0 framework
- +Self-host
- +Bring your own models + data
Cloud
Custom
Teams
- +Hosted runtime
- +Multi-agent orchestration
- +Observability
Sakana AI
Pilot
Custom
Enterprise pilots
- +TRINITY multi-agent orchestration
- +1 use case
- +JP support team
Recommended
Production
Custom
Japanese enterprises
- +Unlimited use cases
- +Finance underwriting agents
- +On-prem + sovereign deployment
Defense
Custom
Government
- +ATLA-grade security
- +Air-gapped deployment
- +Dedicated engineering team
Which one should you pick?
Fixie
Pick Fixie if cost is the main constraint or if auditability or self-hosting matters.
Try Fixie →Sakana AI
Pick Sakana AI if you want the highest autonomy and the verification loop is in place.
Try Sakana AI →Affiliate links. We may earn a commission at no extra cost to you.
Frequently asked
Should I pick Fixie or Sakana AI in 2026?+
Pick Fixie if cost is the main constraint or if auditability or self-hosting matters. Pick Sakana AI if you want the highest autonomy and the verification loop is in place. Most working teams running both can use Fixie for primary work and Sakana AI for the workflows where its specific strengths matter.
What's the price difference between Fixie and Sakana AI?+
Fixie starts at Free · OSS; Sakana AI starts at Subscription. Fixie is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.
Which is more autonomous, Fixie or Sakana AI?+
Sakana AI is the more autonomous of the two (Autonomous vs Semi-autonomous). Higher autonomy ships throughput faster but requires verification loops in place — see our autonomous-vs-copilot framing for when each tier wins.
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Open-source workflow automation with first-class AI agent nodes — self-host or use cloud.
Tool useMemoryMulti-agentDemo · hover to play"Multiplayer AI" — shared, governed company-wide agents across your stack.
Tool useMemoryRAGMulti-agent
See more alternatives: alternatives to Fixie · alternatives to Sakana AI
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