Shortlist by what you need
Start here if you know why you are leaving Fiddler AI.
Want the closest match?
QualifireMost similar to Fiddler AI in what it does, its category and its price.
Visit (opens Qualifire in a new tab)Need a free plan?
CrewAIHas a free plan, rated 4.4 out of 5.
Visit (opens CrewAI in a new tab)Want the lowest price?
Lyzr Agent StudioFrom $19/mo, the lowest starting price here.
Visit (opens Lyzr Agent Studio in a new tab)Want the best rated?
SimplAIRated 4.0 out of 5 in our review, against 3.8 for Fiddler AI.
Visit (opens SimplAI in a new tab)
At a glance
Green means better than Fiddler AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Fiddler AIBaseline | 3.8 | Free | Yes | An AI Control Plane for enterprise agent fleets - real-time guardrails under 80ms latency, 99% precision jailbreak blocking, and continuous evaluation through production. | |
| Qualifire | 4.0+0.2 | Not listed | No | Guardrails, evaluation and red-teaming for LLM apps, with judge models fast enough for runtime. | vs Fiddler AI |
 ChatBotKit | 3.6−0.2 | Free | Yes | Build production AI agents that reason, plan and execute multi-step tasks - resolving tickets, qualifying leads, processing documents - with MCP tool-calling, RAG knowledge bases, and built-in content-moderation guardrails. | vs Fiddler AI |
| Lyzr Agent Studio | 4.1+0.3 | $19/mo | Yes | Enterprise platform for building, testing, and governing production AI agents across any framework. | vs Fiddler AI |
 MLCode | 3.8Same | Not listed | No | Build, deploy, observe and govern enterprise agents across cloud, hybrid and air-gapped estates. | vs Fiddler AI |
 Knowlee | 3.6−0.2 | Free | Yes | Build a shared 'Company Brain' once, then let AI agents run recurring work across sales, recruiting, legal, finance, marketing, ops and procurement - every action needs human approval and leaves an audit trail. | vs Fiddler AI |
| SimplAI | 4.0+0.2 | Not listed | No | An agentic AI operating system for building and governing enterprise agents across cloud, on-prem and air-gapped environments. | vs Fiddler AI |
 Requesty | 3.9+0.1 | Free | Yes | One API for 600-plus models, marked up 5%, with the markup stated on the page. | vs Fiddler AI |
| CrewAI | 4.4+0.6 | Free | Yes | Agents organized like a crew, each with a defined role | vs Fiddler AI |
The alternatives in detail
In order of how closely each one matches Fiddler AI.
Qualifire
4.0Not listed
vs Fiddler AI+0.2
Guardrails, evaluation and red-teaming for LLM apps, with judge models fast enough for runtime.
- Contextual guardrails enforced in real time
- Continuous evaluation and observability
- Rogue agent evaluator and red-team platform
Small judge models make runtime checking affordable
No pricing published anywhere
ChatBotKit
3.6Free
vs Fiddler AI−0.2
Build production AI agents that reason, plan and execute multi-step tasks - resolving tickets, qualifying leads, processing documents - with MCP tool-calling, RAG knowledge bases, and built-in content-moderation guardrails.
- Multi-step autonomous agent reasoning and execution
- MCP-based tool calling connecting agents to APIs and databases
- RAG knowledge bases across multiple document formats
Built-in governance (guardrails, observability) matters for genuine production use
Pay-for-compute billing means costs scale with actual usage, less predictable than flat pricing
Lyzr Agent Studio
4.1$19/mo
vs Fiddler AI+0.3
Enterprise platform for building, testing, and governing production AI agents across any framework.
- Agent Studio for building and orchestrating multi-agent workflows
- No-code Architect builder for non-technical agent creation
- Simulation engine that tests agents across scenarios before launch
Supports agents built on outside frameworks, not only its own builder
Credit limits on the Pro tier can constrain higher-volume agent workloads
MLCode
3.8Not listed
vs Fiddler AISame
Build, deploy, observe and govern enterprise agents across cloud, hybrid and air-gapped estates.
- Full lifecycle: create, deploy, observe and govern agents
- Runs across cloud, hybrid and fully air-gapped on-premise
- AgentKube and HexaKube as a combined operating model
Air-gapped support opens environments most platforms cannot serve
Enterprise implementation project, not a self-serve signup
Knowlee
3.6Free
vs Fiddler AI−0.2
Build a shared 'Company Brain' once, then let AI agents run recurring work across sales, recruiting, legal, finance, marketing, ops and procurement - every action needs human approval and leaves an audit trail.
- Shared 'Company Brain' model of organizational operations
- Specialized AI agents across 7 departments (sales, recruiting, legal, finance, marketing, ops, procurement)
- Human approval required before every agent action executes
Human-approval-before-execution model makes autonomous agents genuinely governable
Detailed pricing beyond the free tier requires a sales conversation
SimplAI
4.0Not listed
vs Fiddler AI+0.2
An agentic AI operating system for building and governing enterprise agents across cloud, on-prem and air-gapped environments.
- Unified control layer for building, governing and scaling enterprise agents
- Deployment across cloud, on-premise and fully air-gapped environments
- Security and governance controls built into the platform rather than added later
Air-gapped support opens use cases most agent platforms cannot serve
Enterprise implementation effort, not a self-serve signup
Requesty
3.9Free
vs Fiddler AI+0.1
One API for 600-plus models, marked up 5%, with the markup stated on the page.
- Routes across 30+ providers and 600+ models
- Automatic failover, load balancing and cost/latency-based routing
- Prompt caching claimed to cut token costs up to 90%
States its 5% markup plainly rather than burying it in a rate card
A single routing layer between your app and every model is a new dependency
CrewAI
4.4Free
vs Fiddler AI+0.6
Agents organized like a crew, each with a defined role.
- Role-based multi-agent orchestration framework
- Open-source and free to use
- Defined agent roles, goals, and tool access
Role-based metaphor is easier to reason about than lower-level frameworks
Still requires real development skill, not a no-code tool
FAQ
Questions people ask
Is Fiddler AI free?
Fiddler AI has a free plan.
What is the best free alternative to Fiddler AI?
CrewAI is the highest-rated alternative here with a free plan (4.4 out of 5). Other free options: Lyzr Agent Studio, Requesty, ChatBotKit.
What is the cheapest alternative to Fiddler AI?
Among paid plans, Lyzr Agent Studio has the lowest starting price (from $19/mo). If you need it free, start with CrewAI.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.