Not hype — the actual AI tools SF founders use daily, sourced from a real Twitter thread.
Not a list of hype. These are the tools the SF founder community said they use daily, surfaced from a single tweet that got 4,692 views. Every pick here came from a real founder recommendation, not a press release or sponsored slot.
---
Community-Recommended Tools
Claude Code
Recommended by: @49agents, @sambit9238, @th_s4m0ht, @bharat (4 recommendations -- most mentioned)
Claude Code is a terminal-first autonomous coding agent from Anthropic. It reads your entire codebase, plans changes across files, and writes multi-file diffs without you guiding every step.
Why founders use it: 1M-token context window (generally available since March 2026 on current Claude models, enabled automatically for Claude Code on Max, Team, and Enterprise plans). 5.5x fewer tokens than Cursor for identical tasks. 82%+ SWE-bench Verified score on current Claude Opus models (Opus 4.7 measured at 82% by independent evals; Anthropic reports 87.6%). Boris Cherny, who leads Claude Code at Anthropic, has not written code by hand since November 2025.
Best for: Complex architecture decisions, large refactors, CI/CD automation, anything that requires holding a lot of context at once.
Cost: $20 to $200/month
Website: claude.ai/code
---
Cursor
Recommended by: @MdMurtuzaali777
Cursor is an AI-native IDE built as a fork of VS Code. Tab completions, inline edits, and Composer mode for multi-file changes. It topped roughly $4B in annualized revenue by June 2026, serving 50,000+ businesses (the oft-cited 360K paying-subscriber figure dates to early 2025), and is the default coding environment for a large share of YC companies.
Why founders use it: The tab completions are the best on the market. It is the easiest on-ramp for engineers who are new to AI-assisted development. Endorsed by Jensen Huang, Patrick Collison, and Greg Brockman.
Best for: Daily rapid prototyping, teams that want visual diffs, founders who want an IDE that feels familiar but moves faster.
Cost: $20 to $200/month
Website: cursor.com
---
Composio
Recommended by: @juliafedorin
Composio is an integration layer that gives AI agents access to 1,000+ apps including Gmail, Slack, GitHub, and Notion. You are not building an agent in isolation -- you are building what the agent can do. Composio handles all the OAuth, token management, and tool-calling reliability so you do not have to.
Best for: Founders building their own agents and automations who do not want to spend weeks on plumbing.
GitHub stars: 29K+
Website: composio.dev
---
Botpress
Recommended by: @NaureenAhm
Botpress is an open-source platform for building production AI chatbots and agents with visual flows. Strong for customer support automation and internal ops bots.
Website: botpress.com
---
Boardy
Recommended by: @aditmag
Boardy is an AI networking agent that calls founders, investors, and operators, then makes warm introductions. It has productized the introduction layer that no one else has built well.
Caveat: Data quality is self-reported from LinkedIn. Verify investor check-writing status independently before taking a meeting based on a Boardy intro.
Raised: $8M
Website: boardy.ai
---
Kiro
Recommended by: @Lockhead
Kiro is an agentic IDE from Amazon. It converts natural language into specs, then builds from the spec. This is spec-driven development rather than vibe coding.
Why it is different: Moves you from writing code fast to building systems correctly. Auto-generates tests, documentation, and coding standards on every save.
Website: kiro.dev
---
Viktor
Recommended by: @chrsabraham ("insane")
Viktor is an AI coworker that lives in Slack. It connects to 3,000+ business tools and can pull live data, write reports, build web apps, and manage GitHub PRs -- all without leaving your Slack workspace.
Why founders use it: No installation, no context switching. Tell it in Slack to pull your Stripe MRR, summarize it, and post it to the metrics channel. It does.
Website: getviktor.com
---
Gemini
Recommended by: @ethankongee ("goes through my emails and organizes billing information")
Google's LLM with strong Gmail and Workspace integration. Best for founders who live in Google Workspace and want ambient AI on their communications without switching tools.
---
Perplexity
Recommended by: @49agents
AI-powered research engine with real-time web search and synthesis. Better than Google for competitive research, investor prep, and deep dives where you need citations.
Website: perplexity.ai
---
How to Pick Your Stack
Use this as a starting point:
- Coding daily? Start with Cursor. Add Claude Code for big refactors and architecture work.
- Building your own agent? Use Composio for integrations.
- Need to automate business workflows in Slack? Try Viktor.
- Want to expand your network? Try Boardy but verify manually before meetings.
- Research and competitive intel? Perplexity over Google.
The honest answer is that most serious SF founders are running 2 to 3 of these simultaneously. Cursor for daily coding, Claude Code for heavy lifts, and something like Perplexity or Viktor for ops.
---
Know a tool that should be on this list? Submit it
Last updated: March 2026 | Sources: community Twitter thread (4,692 impressions)
---
Related Guides