Best Developer Tools of May 2026

1. 1

   1. TestSprite 3.0

   465 upvotes

   Let a fleet of parallel agents test your app in minutes

   TestSprite generates and runs end-to-end tests for your app, autonomously. For backend, we can now generate complex integration tests with dynamic variables, auto-cleanup, and Data Flow debugging. For frontend, we now send a fleet of…

   #1 on May 22, 2026testsprite.com5 makers, 5 with emails
2. 2

   2. Huddle01 VMs

   436 upvotes

   Virtual Machines for Your Agents

   Huddle01 Cloud allows you to spin up a Virtual Machine (VM) from your favourite AI assistant now! The MCP server lets you control your infrastructure setup on Huddle01 just by chatting. Works with Claude, Cursor, Antigravity, or anywhere…

   #1 on May 3, 20266 makers
3. 3

   3. Monid 2.0

   417 upvotes

   OpenRouter for agent tools

   One skill, every tool your agent needs. Monid is OpenRouter for agent tools. Plug in once, and your agent can discover, compare, and pay for any of 200+ tools on demand: social scrapers, search APIs, ecommerce data, lead gen, and more.

   #2 on May 8, 2026monid.ai
4. 4

   4. Powabase

   404 upvotes

   Build AI apps with Postgres, RAG, and agents

   Powabase is a backend-as-a-service for AI-native applications, combining Postgres, RAG, agents, memory, workflows, and automation primitives in one platform. It helps agencies and in-house IT teams build new AI apps or add AI automation…

   #1 on May 27, 2026powabase.ai4 makers, 4 with emails
5. 5

   5. /monitor by Firecrawl

   356 upvotes

   Notify your AI agent when the web changes

   /monitor notifies your agent via webhook the moment pages or sites change. Use up to 90% fewer LLM tokens by only ingesting what changes on a page.

   #2 on May 29, 20261 maker
6. 6

   6. Drizz

   345 upvotes

   Mobile tests that write, run, and fix themselves

   Drizz is an AI-powered mobile test automation platform built around intent-based testing. Simply describe what you want to test in plain English, Drizz executes it on a real device using Vision AI and automatically authors a reusable test…

   #2 on May 19, 20261 maker
7. 7

   7. Flowstep 1.0

   321 upvotes

   AI design engineer. Design & ship real UI.

   Flowstep is the AI design engineer for developers and technical designers tired of rebuilding designs in code. Prompt or edit on an infinite canvas. Export production code or connect with your agents and apps via MCP. What you design is…

   #3 on May 5, 2026flowstep.ai1 maker, 1 with an email
8. 8

   8. Google Antigravity CLI

   248 upvotes

   Run coding agents directly from your terminal

   Antigravity CLI brings multi-step reasoning, multi-file editing, tool calling, and persistent history to the terminal. Optimised for SSH sessions and keyboard-first workflows. For developers who live in the command line.

   #2 on May 23, 20261 maker
9. 9

   9. ClawSecure

   243 upvotes

   The AI-Powered Antivirus for AI Agents

   ClawSecure is the AI-powered antivirus for AI agents. Pre-install scanning, real-time runtime monitoring, an in-agent Security Companion Agent, and a sub-200ms Verification API. Full 10/10 OWASP ASI coverage. 41% of top agents are…

   #5 on May 10, 20261 maker
10. 10

    10. Fabraix

    196 upvotes

    Find gaps in your AI agents before users do

    AI agents fail in ways traditional software doesn't. Our agents help you find all the ways in which your AI agents fail by adversarially testing them in a dedicated environment. Point it at any AI agent, or multi-agent system, and it…

    #6 on May 8, 2026YC S26fabraix.com1 maker, 1 with an email
11. 11

    11. ExploreYC

    167 upvotes

    Your data layer for Y Combinator's startup ecosystem

    Explore 5,773+ Y Combinator companies with powerful search, interactive maps, AI-powered company intelligence, hiring insights, funding data, and batch analytics. Find co-founders, validate startup ideas, and discover patterns across 20…

    #5 on May 7, 2026exploreyc.com
12. 12

    12. Asteroid

    163 upvotes

    Build Browser, Linux and Windows AI agents in seconds

    Asteroid lets ops teams and engineers build computer-use agents for browser, Linux, and Windows workflows in minutes. Our meta-agent, Astro, builds the agents, writes scripts as it goes, and makes repeat runs faster and cheaper. Last…

    #10 on May 14, 2026YC W251 maker
13. 13

    13. Haystack

    121 upvotes

    Review the pull requests that actually need human attention

    Haystack helps engineering teams manage the growing volume of AI-generated pull requests. It sits on top of GitHub, analyzes each PR’s diff, codebase context, agent trace, intent, and verification evidence, then routes it: safe to move…

    #12 on May 19, 20261 maker
14. 14

    14. CatchAll by NewsCatcher

    116 upvotes

    Build any dataset from the web. Filtered to your criteria.

    CatchAll is a web search API that builds structured datasets from the open web. Submit a query, and it scans thousands of web pages, validates every result, and returns clean, deduplicated records — not a ranked list of links, but a…

    #12 on May 21, 20261 maker
15. 15

    15. Layers

    116 upvotes

    Create beautiful animated code snippet videos for free

    Layers is a free web-based tool that empowers anyone to create beautiful, animated code snippet videos. Inspired by sites like Carbon, Layers features a customizable code editor, support for popular languages, various aspect ratios, and…

    #8 on May 27, 2026YC F251 maker
16. 16

    16. Calling Skills for AI Agents

    116 upvotes

    Add voice and video calling via your coding agent

    HD voice and video calling by CometChat, built to fit into and grow with your platform. Packed with recording, screen sharing, call logs, raise hand, broadcast mode, picture-in-picture, and more. Integrate via UI Kits, SDKs, or a single…

    #10 on May 27, 20261 maker
17. 17

    17. buildpipe

    115 upvotes

    Compose, run and automate multi step AI developer workflows

    A local-first pipeline automation app for developers powered by AI, running natively on your machine. Think of it as a local Zapier or n8n, built specifically for developers who want to chain shell commands, AI calls, HTTP requests, and…

    #11 on May 22, 20261 maker
18. 18

    18. Polarity

    113 upvotes

    The Self-Improvement Stack For agents

    Polarity monitors every agent decision in production, surfaces failure patterns before users hit them, and turns trajectories into evals that compound your agent’s reliability over time!

    #9 on May 18, 20261 maker
19. 19

    19. marpy.io

    110 upvotes

    AI coding platform built specifically for the Python stack

    Marpy is a web-based IDE and AI coding assistant built specifically for the Python stack. It helps you go from idea to deployed app without wrestling infra, glue code, or half-baked JS-focused tools. Get Python-native autocomplete…

    #14 on May 26, 20261 maker
20. 20

    20. Triggered Agents by Adaptive

    110 upvotes

    AI agents that run automatically on business events

    Adaptive lets you attach AI agents to events in your business tools so they act automatically when a trigger fires. For founders and operators running multi-tool workflows.

    #13 on May 18, 2026adaptive.ai
21. 21

    21. KodHau

    109 upvotes

    Stop AI agent from breaking prod—give it your team's history

    KodHau MCP gives your AI agent the tribal knowledge of your team: PR history, design decisions, and review comments your senior engineers never documented.

    #18 on May 8, 2026kodhau.com1 maker, 1 with an email
22. 22

    22. DCP

    104 upvotes

    Give your AI agents encrypted permission and keys

    Today, many agents read keys and sensitive info from dotenv files, configs, or memory. One bad prompt or compromised tool can drain your wallet, API bill, or private data. DCP makes agents safe for real work: your wallets and API keys…

    #15 on May 22, 20261 maker
23. 23

    23. crunr

    103 upvotes

    Launch and run any compute job on AWS with 1 command

    crunr — run it, ghost it. GPU compute is $1.5/hr. But your real bill looks like this: - Idle time sitting there: $800/mo - Infra team to manage it: $3,000/mo - Failed setups and debugging: days lost - 3am emergency fixes: priceless crunr…

    #15 on May 26, 2026crunr.com1 maker, 1 with an email
24. 24

    24. MoDev

    102 upvotes

    The AI dev environment built for your phone.

    The AI dev environment built for your phone. Connect GitHub, Vercel, Supabase, Gmail, Calendar, and more. Any AI. Any API. Then chat to ship. → Deploy from your phone → Read repos, commit, open PRs → Query your database with natural…

    #15 on May 29, 2026modev.app1 maker, 1 with an email
25. 25

    25. DNSimple CLI

    98 upvotes

    Manage Your DNS from the Command Line with DNSimple CLI

    Manage your domains and DNS without leaving the terminal, built for developers who live in their terminals and CI pipelines. What you can do: create, update, and delete DNS records; register domains and manage renewals; issue and manage…

    #18 on May 26, 2026

Junior imports every day's Product Hunt leaderboard. Each launch is filed under the first topic its makers chose, so it appears in one category only. This list takes the Developer Tools launches dated in May 2026 and ranks them by their upvotes. It refreshes daily.

• Best Productivity Tools214
• Best Design Tools76
• Best Open Source Tools67
• Best Mac Apps46
• Best Android Apps37
• Best Marketing Tools38
• Best AI Tools41
• Best SaaS Tools27
• Best iOS Apps23
• Best APIs36
• Best Chrome Extensions28
• Best Analytics Tools27
• Best Health & Fitness Apps23
• Best Social Media Tools13
• Best Sales Tools20
• Best Fintech Tools25

• All Developer Tools585
• Every launch in May 2026
• All best-of lists

What was the top Developer Tools launch of May 2026?

TestSprite 3.0 ("Let a fleet of parallel agents test your app in minutes"), with 465 upvotes on May 22, 2026, where it finished #1 of the day.

How many Developer Tools launched in May 2026?

58 on Product Hunt, with 6,570 upvotes between them. This list shows the 25 most upvoted.

How is this list ranked?

By Product Hunt upvotes, as recorded on launch day. Ties go to the launch with the better daily rank. Every launch is counted once, in the category its makers listed first.

How do I reach the makers of these Developer Tools?

Each launch links to its page on Junior, with the people behind it (33 makers across this list). Junior adds their verified work emails, LinkedIn and X profiles for subscribers.