Compare AI tools

	Perplexity S	Replicate S	GitHub Copilot B	Devin A
Tagline	AI search done right. Cited answers, not chat theater.	Run any open-source AI model with an API call.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Cognition Labs' autonomous coding engineer.
Category	research	dev platform	coding	agents
Pricing	Free + $20/mo Pro	Pay per second of compute	Free (limited) + $10/mo Pro + $19/mo Business	$500/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	Developers using open-source models (Flux, SDXL, Whisper, etc).	Teams with GitHub already. Devs who don't want to change IDEs.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Tens of thousands of models (image, video, audio, LLMs) One-line API for any model Cog framework for custom model deploy	Great enterprise story Works in your existing IDE Chat + autocomplete	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Cold starts on less-popular models Pricing gets real at scale	Less agentic than Cursor/Claude Code Model quality varies	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for open-source model APIs. The default in this space.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
Link	Open →	Open →	Open →	Open →