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Fastgen vs Manifest
Fastgen focuses on visual backend building, while Manifest is a routing gateway with auto-fix and fallback logic.
Which to pick
Pick Fastgen if you want…
- Visual backend builder
Pick Manifest if you want…
- Auto-fixing LLM requests
- Open-source code (mnfst/manifest on GitHub)
Side by side
- What it is
- Fastgen:Webflow for the Backend
- Manifest:Manifest is an LLM gateway that routes requests, auto-fixes bad calls, provides fallbacks and observability.
- Best for
- Fastgen:Visual backend builder
- Manifest:Auto-fixing LLM requests
- Who it’s for
- Fastgen:—
- Manifest:Developers building AI-enabled apps who need reliable LLM routing and monitoring.
- Pricing
- Fastgen:Subscription
- Manifest:Freemium
- Plans
- Fastgen:—
- Manifest:Free $0/month · Pro $19/month
- Open source
- Fastgen:—
- Manifest:Yes
- Works with
- Fastgen:—
- Manifest:OpenAI, Anthropic, Google, DeepSeek, AWS Bedrock, Claude, Gemini, Mistral
Fastgen features
Webflow for the Backend
Manifest features
- Single-endpoint routing. Access all models and providers through one unified endpoint.
- Autofix. Automatically repairs malformed or failed LLM requests on the fly.
- Fallback handling. Routes to alternative providers when the primary model is down.
- Observability dashboard. Tracks request count, tokens, cost and success rates per model.
- Provider agnostic. Connect any usage-based or subscription LLM provider via API keys.
- Self-hostable Docker image. MIT-licensed Docker image lets you run Manifest on-premise with no request limits.
Fastgen vs Manifest FAQ
Is Fastgen or Manifest free?+
Fastgen is listed on DevHunt as a paid subscription. Manifest has a free plan; paid plans start at $19/month (Pro).
Is Fastgen or Manifest open source?+
Manifest is open source (mnfst/manifest on GitHub). DevHunt has no public source repository on record for Fastgen.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.