stack.tools

AI Coding Tools

What their engineers code with (Cursor, Claude Code, Copilot, Windsurf, internal assistants).

30 verified facts across 26 companies

Atlassian

Team collaboration software — Jira, Confluence, and more than 20 other products.

Claude Code by Anthropic

Used heavily across engineering for internal development work.

High confidence

Receipts · 2

Show quotes (2)
  • “Inside Atlassian, the same kind of work runs on Claude Code.” — claude.com, Aug 2026
  • “used heavily across engineering, and a recent pilot extended it to non-technical teams” — claude.com, Aug 2026

Source last verified Aug 31, 2026

Avalara

Tax compliance automation software company.

v0 by Vercel

Translates plain language into working prototypes for validation.

High confidence

Receipts · 1

Show quotes (1)
  • “Enter Vercel’s v0 , which translates plain language into working prototypes.” — vercel.com, Feb 28, 2026

Source last verified Jul 27, 2026

Carvana

Online used-car retailer.

Claude Tag by Anthropic

Investigates production alerts in Slack and opens pull requests.

High confidence

Receipts · 2

Show quotes (2)
  • “Our teams are using Claude Tag to move from a production alert in Slack to investigation” — claude.com, Sep 2026
  • “The wholesale platform team now relies on Claude Tag in production.” — claude.com, Sep 2026

Source last verified Sep 7, 2026

Caylent

AWS premier consulting partner delivering cloud and AI services.

Claude Code by Anthropic

Serves as engineers' primary development tooling.

High confidence

Receipts · 1

Show quotes (1)
  • “made Claude Code our engineers’ primary development tooling.” — claude.com, Jul 2026

Source last verified Jul 27, 2026

Code and Theory

Digital-first creative and technology agency.

v0 by Vercel

Replaces wireframes with prompt-to-code workflows.

High confidence

Receipts · 1

Show quotes (1)
  • “prompt-to-code workflows in v0” — vercel.com, Jun 9, 2026

Source last verified Jul 27, 2026

Cursor (Anysphere)

AI code editor and agentic coding platform (Agent, Tab, Composer, Bugbot, Cloud Agents).

Cursor by Anysphere

Builds Cursor with Cursor through company-wide dogfooding.

High confidence

Receipts · 2

Show quotes (2)
  • “real agent requests from engineers and researchers at Cursor” — cursor.com, Oct 29, 2025
  • “whether they wrote it by hand, or had Cursor generate it” — newsletter.pragmaticengineer.com, Jun 10, 2025

Source last verified Jul 26, 2026

Bugbot by Anysphere

Reviews every internal pull request with Cursor's own AI reviewer.

High confidence

Receipts · 1

Show quotes (1)
  • “We also run Bugbot on all internal code at Cursor.” — cursor.com, Jan 15, 2026

Source last verified Jul 26, 2026

Cyera

Data security platform that discovers, classifies, and maps access to enterprise data.

Claude Code by Anthropic

Primary agentic coding tool for the R&D organization.

High confidence

Receipts · 1

Show quotes (1)
  • “R&D using Claude Code primarily” — claude.com, Aug 2026

Source last verified Aug 22, 2026

Deepgram

Speech AI platform for real-time speech-to-text, text-to-speech, and voice agents.

Claude Code by Anthropic

Default engineering loop, connected to internal systems over MCP.

High confidence

Receipts · 1

Show quotes (1)
  • “The default engineering loop runs through Claude Code” — claude.com, Aug 2026

Source last verified Aug 22, 2026

DXC Technology

IT services provider running the core platforms behind the global insurance industry.

Claude Code by Anthropic

Field development engineers build the insurance Smart Apps with it.

High confidence

Receipts · 1

Show quotes (1)
  • “its field development engineers build them with Claude Code.” — claude.com, Sep 2026

Source last verified Sep 7, 2026

Eve

Legal AI platform for plaintiff law firms.

HubSpot

Customer platform for marketing, sales, and service teams.

Claude Code by Anthropic

Accelerates development, connected to internal infrastructure through MCP.

High confidence

Receipts · 1

Show quotes (1)
  • “Engineering uses Claude Code for development work” — claude.com, Jul 2026

Source last verified Jul 27, 2026

Klarna

Swedish buy-now-pay-later payments and consumer banking company (NYSE: KLAR).

Cursor by Anysphere

The CEO vibe-codes feature prototypes before handing them to engineering.

Medium confidence

Receipts · 2

Show quotes (2)
  • “I was a business person, and then I just started exploring Cursor” — finance.yahoo.com, Sep 15, 2025
  • “I've been vibe coding my whole life.” — sourcery.vc, Sep 12, 2025

Source last verified Jul 26, 2026

League

Digital health platform powering consumer health experiences for health plans and providers.

Claude Code by Anthropic

Underpins Swarm, the internal orchestrator running overnight autonomous coding sessions.

High confidence

Receipts · 1

Show quotes (1)
  • “Runs overnight autonomous coding sessions through Swarm, League's internal orchestration tool built on Claude Code” — claude.com, Aug 2026

Source last verified Aug 22, 2026

LG CNS

Korean IT services company of LG Group delivering enterprise system integration.

Claude Code by Anthropic

Standard development approach across the enterprise modernization Build Center.

High confidence

Receipts · 1

Show quotes (1)
  • “Adopted Claude Code as the standard development approach across the 200-engineer Build Center” — claude.com, Jul 2026

Source last verified Jul 27, 2026

Notion

Connected AI workspace for docs, wikis, projects, and enterprise search (Notion AI, Agents, Q&A).

Claude Code by Anthropic

Fastest-growing agentic coding assistant among Notion's engineers.

Medium confidence

Receipts · 1

Show quotes (1)
  • “Claude Code and Codex Are Outpacing Cursor Among Notion's Engineers” — theinformation.com, Mar 24, 2026

Source last verified Jul 26, 2026

Cursor by Anysphere

AI IDE in active use by Notion engineers.

Medium confidence

Receipts · 2

Show quotes (2)
  • “Anyscale lets me use my preferred tools like VSCode or Cursor on my laptop” — anyscale.com, Jul 2026
  • “Claude Code and Codex Are Outpacing Cursor Among Notion's Engineers” — theinformation.com, Mar 24, 2026

Source last verified Jul 26, 2026

Perplexity

AI answer engine combining a proprietary web index with LLMs to deliver cited, conversational search.

Cursor by Anysphere

Mandatory AI coding tool used across engineering and beyond.

Medium confidence

Receipts · 2

Show quotes (2)
  • “They upload my screenshot to Cursor and then ask it to write a change to the Swift UI file” — aol.com, Jul 14, 2025
  • “made it compulsory” — entrepreneur.com, Jul 15, 2025

Source last verified Jul 26, 2026

Pictet

Swiss private bank and asset manager serving a small number of very large clients.

Claude Code by Anthropic

Rolled out across engineering, product, and business teams for coding and automation.

High confidence

Receipts · 2

Show quotes (2)
  • “We are using Claude Code and Claude Cowork for problems where our other tools fall short” — claude.com, Sep 2026
  • “Around 700 people across the group now have access to Claude Code and Claude Cowork” — claude.com, Sep 2026

Source last verified Sep 7, 2026

RAINN

Largest US anti-sexual-violence organization, operating the National Sexual Assault Hotline.

Claude Code by Anthropic

Builds infrastructure for crisis support integrations.

High confidence

Receipts · 1

Show quotes (1)
  • “uses Claude Code to build infrastructure for crisis support” — claude.com, Jul 2026

Source last verified Jul 27, 2026

Ramp

Finance automation platform for corporate cards, expenses, and payments.

Claude Code by Anthropic

Runs the On-call Assistant and engineers' local development work.

High confidence

Receipts · 1

Show quotes (1)
  • “On-call Assistant, which has always run on Claude Code” — claude.com, Aug 2026

Source last verified Aug 22, 2026

Rocket Money

Personal finance app for tracking spending, canceling subscriptions, and negotiating bills.

Claude Code by Anthropic

Primary tool for writing the code behind Rowan.

High confidence

Receipts · 1

Show quotes (1)
  • “The code itself is written with Claude Code, using primarily Opus, with Fable in the mix as well.” — claude.com, Aug 2026

Source last verified Aug 31, 2026

Shopify

E-commerce platform powering millions of merchant storefronts and an AI merchant assistant (Sidekick).

Cursor by Anysphere

Standard AI code editor across engineering.

High confidence

Receipts · 2

Show quotes (2)
  • “I ordered 1,500 Cursor licenses last year and quickly had to procure another 1,500.” — firstround.com, Jul 15, 2025
  • “Developers have proxy, Copilot, Cursor, Claude code” — x.com, Apr 7, 2025

Source last verified Jul 26, 2026

GitHub Copilot by GitHub (Microsoft)

Longest-standing AI coding tool in the sanctioned developer toolkit.

High confidence

Receipts · 2

Show quotes (2)
  • “Pretty quickly, our adoption increased to 80% and GitHub started asking us how we did that” — firstround.com, Jul 15, 2025
  • “Developers have proxy, Copilot, Cursor, Claude code” — x.com, Apr 7, 2025

Source last verified Jul 26, 2026

Claude Code by Anthropic

Sanctioned agentic coding tool, also embedded as Roast's coding agent.

High confidence

Receipts · 2

Show quotes (2)
  • “There is chat.shopify.io, which we had for years now. Developers have proxy, Copilot, Cursor, Claude code” — techstartups.com, Apr 7, 2025
  • “Claude Code has transformed how we build internal tools at Shopify” — claude.com, Jul 2026

Source last verified Jul 26, 2026

Slack

Workplace messaging and collaboration platform, part of Salesforce.

Claude Code by Anthropic

Fixes bugs and accelerates engineering workflows.

High confidence

Receipts · 1

Show quotes (1)
  • “the team uses Claude Code to fix bugs and power teams to move faster.” — claude.com, Jul 2026

Source last verified Jul 27, 2026

Spellbook

AI contract review, drafting, and negotiation for lawyers, inside Microsoft Word.

Claude Code by Anthropic

Primary coding agent for its engineering team.

High confidence

Receipts · 2

Show quotes (2)
  • “Runs its own engineering fully on Claude Code” — claude.com, Aug 2026
  • “Our engineering team is all in on Claude Code.” — claude.com, Aug 2026

Source last verified Aug 31, 2026

Spotify

Music and audio streaming service.

Claude Code by Anthropic

Terminal-first agentic coding across monorepos, with several background sessions.

High confidence

Receipts · 1

Show quotes (1)
  • “I run it in a bunch of Max sessions in a terminal” — claude.com, Aug 2026

Source last verified Aug 22, 2026

Stripe

Payments infrastructure platform for the internet.

v0 by Vercel

Prototypes customer-facing value calculator applications.

Medium confidence

Receipts · 1

Show quotes (1)
  • “Mario Braz, Stripe GTM Business Value Consulting, used v0 to prototype a full application during a long-haul flight.” — vercel.com, Jan 28, 2026

Source last verified Jul 27, 2026

The Weather Company

Weather data and forecasting company behind weather.com.

v0 by Vercel

Generates front-end interfaces to speed design-to-development cycles.

High confidence

Receipts · 1

Show quotes (1)
  • “web serving stack and CMS on Vercel and v0” — vercel.com, Jun 9, 2026

Source last verified Jul 27, 2026