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30,29020Released 1mo agoFree + from $49

John Goodhew🙏 34 karmaOct 3, 2025@FirstSign AII’m allergic to synthetic data, but I gave FirstSign a spin and… my calendar sent a thank-you note. Skipped the cold DMs and got surprisingly sharp interviews for early validation. Feels like cheating, but I’ll allow it ;) -
10,0017Released 4mo agoFree + from $24/mo

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2,4811Released 5mo agoFree + from $200/mo

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61216Released 3mo agoFree + from $20/mo
As the founder of BuildOrNot.io, I’m excited to announce that our platform has just been launched. At this early stage, our most valuable asset is your feedback. I warmly invite you to try BuildOrNot.io and share your thoughts—both the strengths you find useful and the shortcomings we should improve. Your ratings and comments will directly help us refine the tool, enhance the user experience, and make the platform more valuable for every entrepreneur. Your voice matters, and I truly appreciate your support on this journey. -
3257Released 29d agoFree + from $24.90/mo

Other tools
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14,450441v2.5 released 10mo agoFree + from $29Edisa, thanks for the reply. Didn't know about the confidentiality guarantee.
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51,998273v2.3 released 7mo agoFree + from $6/mo
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Open3,85657v2.0 released 1d agoFrom $29/moAdded major new retrieval methods including retrieve-by-ISIN, retrieve-by-email, and split endpoints for domain, ticker, and company name, improving clarity and flexibility. Introduced a fairer billing model: customers are charged only for successful 200 responses, not bad domains or invalid inputs. Launched powerful new APIs: Screenshot API, Styleguide API, AI Query API, and Prefetch API to improve brand extraction, design-system retrieval, automated screenshotting, and pre-warming performance. Delivered significant speed boosts across infrastructure—20% faster retrieve calls, 40–60% faster screenshot/styleguide pipelines, 30% lower latency overall, and cold-hit retrieval reduced to ~9s. Added new parameters & controls like ticker_exchange, page, prioritize, maxSpeed, and timeoutMS to give developers more precision and customization. Improved data quality with updates such as better wordmark extraction, reduced false positives, enhanced NSFW detection, EIC industry classification, and accurate link detection (careers, blog, terms, pricing, etc.). Expanded platform ecosystem with GitHub login, Zapier 2.0, new Python, Ruby, and TypeScript SDKs, and contact/industry previews in the API playground. Launched new Developer Portal, integrated it into the main site, added invoice management, plan upgrades/downgrades, and a built-in feedback widget. Strengthened reliability with better error handling, validation, DDoS protection, API history fixes, and a new API History dashboard for usage analytics.
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3,73030Released 2y agoNo pricing
- Spotlight: Speechmatics | AI Voice Agents (Voice agents)
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Test your products and messaging with AI-powered campaigns before launch.Open3,408115Released 1y agoFree + from $99/mo
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2,56519Released 1y agoNo pricing
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2,47030Released 2y agoFree + from $99/mo
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Open3,01619v2.0 released 2h agoFrom $29.99/moWhat's New: - Easily query all data points with an AI Chat - Weekly updates with fresh real-world problems and opportunities - Multi-source intelligence backed by real user complaints and evidence - Advanced market size data and validation metrics for each opportunity, as well as individual source links to the user review or post - Problems organized by industry, target users, and business type - Reddit Pipeline builder for custom problem and idea discovery from Reddit in minutes - G2 analysis revealing opportunities by showing what users hate about existing software - Upwork analysis identifying tasks that can be automated into products - App Store analysis from negative reviews across multiple categories to find mobile app opportunities - BuildGuide - AI cofounder walking you through 8 validation stages - BuildHub - Complete workspace for product planning and management - Infinity Canvas - Interactive board for visualizing your entire product plan and market research - Project management with Kanban boards and task tracking - Built-in CRM for managing early users and feedback - AI prompts generated for each development phase based off of an idea - MCP Server for advanced Reddit automation and customization -
1,86334Released 2y agoFrom $9.99Really helpful tool! It provided me with all sorts of awesome insights.
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1,70820Released 3y agoFrom $108.24/mo
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1,63626Released 7mo agoFree + from $49We can't always rely on finding our co-founders among our acquaintances, we needed an online platform that has all the information we need to know when finding people that would align with our goals, values, and required roles.
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1,1029Released 3y agoFree + from $199/mo
- Didn't find the AI you were looking for?
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1,07431Released 1y agoNo pricing
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97614Released 2y agoFrom $1.5
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941224v1 released 3y agoFrom $120.00Really negative. Maybe my idea was terrible but I didn't get any constructive criticism.
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1,08131Released 1y agoNo pricing
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82930Released 1y agoFrom $147
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80015Released 10mo agoFree + from $15/mo
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7078Released 1y agoNo pricing
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55214Released 1y agoFrom $3
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53012Released 1y agoFrom $4.99
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36917Released 1y agoFree + from $4.99/mo
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3227Released 1y agoNo pricing
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4083Released 1y agoFree + from $175/mo
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AI-powered startup validation for successful launchOpen2078070Released 10mo ago100% Free -
73Released 1y agoNo pricing
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Open561881Released 2y ago100% Free -
Open402224Released 2y ago100% Free -
Strategist for launching products with lean and agile methods.Open22144Released 2y ago100% Free -
19081Released 2y ago100% Free
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181526Released 2y ago100% Free
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173232Released 2y ago100% Free
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13839Released 2y ago100% Free
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Inspiring entrepreneurship with 'Lean Startup' principles.Open119114Released 2y ago100% Free
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762146Released 2y ago100% Free
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