Compare AI tools

	Windsurf A	GitHub Copilot B	Genspark A	Cartesia S
Tagline	Codeium's agentic IDE. Cascade agent + strong free tier.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	AI agent for deep search. Generates Sparkpages — full mini-reports.	Ultra-low-latency voice. Built for realtime agents.
Category	coding	coding	research	voice
Pricing	Free + $15/mo Pro	Free (limited) + $10/mo Pro + $19/mo Business	Free + $25/mo Plus	Free tier + usage-based API
Best for	Developers who want Cursor-like power for less money.	Teams with GitHub already. Devs who don't want to change IDEs.	Travel planning, shopping comparisons, deep research where you want an artifact back.	Developers building voice agents, phone bots, interactive apps.
Strengths	Cheaper than Cursor Cascade agent for multi-file tasks Solid free tier	Great enterprise story Works in your existing IDE Chat + autocomplete	Sparkpages = curated multi-source mini-articles Agent can book, compare, shop Autopilot agent for long tasks	< 90ms latency — the fastest in the market Sonic model sounds natural Developer-friendly API
Weaknesses	Smaller community Model selection more limited	Less agentic than Cursor/Claude Code Model quality varies	Early-stage — rough edges Less reliable than Perplexity for simple questions	Fewer voices than ElevenLabs Less consumer-facing brand
Kai's verdict	A-tier. Close second to Cursor. If $5/mo matters, start here.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Bet on this one — the Sparkpage format is genuinely new.	S-tier for realtime. If latency matters more than voice catalog, start here.
Link	Open →	Open →	Open →	Open →