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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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Braintrust
✓ verifiedFreemium
AI observability and evaluation platform for tracing LLM apps, running evals and catching quality regressions before release.
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Base44
✓ verifiedFreemium
No-code AI platform that builds full-stack apps, websites and agents from plain-language prompts with hosting built in.
18M visits/mo
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Kagi
✓ verifiedFreemium
Ad-free, privacy-first search engine with AI tools and a browser, funded by subscriptions instead of tracking.
5.2M visits/mo
Pricing
Starter: $0/mo (1GB data, 10k scores, 14-day retention)
Pro: $249/mo (5GB data, 50k scores, 30-day retention)
Free: $0
Starter: $16/mo
Builder: $40/mo
Pro: $80/mo
Elite: $160/mo
No public pricing
Free trial available
Core features
- ✦Real-time trace and tool-call inspection
- ✦Evals with LLM, code or human scoring
- ✦Versioned datasets built from production traces
- ✦'Topics' automatic pattern discovery and online scoring
- ✦Quality gates and regression alerts
- ✦SDKs for Python, TypeScript, Go and more, plus an MCP server
- ✦Prompt-to-app full-stack generation
- ✦Built-in backend, database and auth
- ✦One-click integrations (Slack, Notion, HubSpot, etc.)
- ✦Instant hosting and custom domains
- ✦Superagents for automated workflows
- ✦GitHub sync and code export
- ✦Ad-free, tracker-free web search
- ✦Customizable ranking and site filters
- ✦Kagi Assistant with multiple LLMs
- ✦Orion privacy browser
- ✦Translate, News, and Summarize tools
- ✦Team plans for organizations
Use cases
- →Monitoring LLM apps in production
- →Comparing prompts and models via experiments
- →Building regression tests from real failures
- →Building internal tools and dashboards
- →Launching websites and landing pages
- →Creating customer portals and CRMs
- →Deploying AI agents that automate tasks
- →Searching without ads or tracking
- →Using AI models grounded in web results
- →Private browsing across devices
- →Summarizing long articles
- →Team-wide private search
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