How to build an AI SaaS Application in 2025 ?
Vincent Josse shares his experience building AI SaaS products in 2025, focusing on solving real problems, pragmatic tech choices, and the evolving landscape of AI workflows and agents.
Vincent Josse has been building AI systems at scale and now leads Blog SEO, an AI SaaS application designed to automate SEO content creation efficiently. He shares practical advice for founders launching AI SaaS products amid today's crowded and evolving market.
Key Takeaways: Building AI SaaS in 2025
Evolving AI Landscape:
- The AI space is moving from AI workflows to AI agents with more autonomous decision-making
- Increased market understanding makes communication and marketing easier but raises competition
- Low-code wave accelerates development but makes product quality critical to stand out
Focus on Real Problems:
- Start with solving an actual problem, not just building AI for AI’s sake
- AI should be a means to an end, enhancing existing workflows without forcing the fit
- Validation through problem significance and business impact is crucial
Tech Stack & Engineering:
- Prioritize user experience and output content quality
- Use pragmatic, plug-and-play cloud services like Vercel for hosting and OpenAI for APIs
- Avoid over-engineering infrastructure to move fast and focus on core value
Validation & Conviction:
- Conviction sustains founders through hard times and public scrutiny
- Building in public connects users to the founder’s journey, building trust
- Validation comes from real customer pain, measurable time savings, and revenue impact
Q: Vincent, what's different about building AI SaaS today versus a year ago?
Vincent: A lot has changed. We’re shifting from simple workflows to AI agents that can choose next steps autonomously. The market is more educated now but also more crowded, so app quality is key.
Low-code tools let many build faster but quality often suffers. You have to focus on making a great app that solves a real problem well.
🔥 ChaiNet's Hot Take: AI SaaS isn't just about AI anymore—it's an arms race for quality and usability.
Q: What’s one reality check for anyone building AI SaaS now?
Vincent: Don’t start with AI; start with the problem. AI is a tool, not the purpose. If AI fits well to solve your problem, great—use it. Otherwise, you risk building something no one needs.
🔥 ChaiNet's Hot Take: Problem-first beats AI-first every time.
Q: How do you pick your tech stack?
Vincent: Focus on what improves your product for users. Don’t reinvent basics. I use Vercel for hosting—it's fast and easy—and OpenAI’s APIs for AI. Hosting your own GPU servers is a nightmare and slows you down.
🔥 ChaiNet's Hot Take: Outsource everything you can that doesn't improve your product. Focus your engineering energy on what truly matters.
Q: How do you validate your AI SaaS idea?
Vincent: I solve my own pain—in my case, automating SEO content writing. I also talked to an SEO agency that confirmed the pain. Validation means knowing how your tool saves time or makes money.
A good offer includes the dream outcome, likelihood of achieving it, time involved, and cost/effort to the user.
🔥 ChaiNet's Hot Take: Validation is math plus empathy. Know the outcome your users want and prove you deliver it faster and cheaper.
Q: What’s the hardest part of your journey?
Vincent: Building conviction. You’ll face negativity, doubts, and sometimes want to quit. You need strong belief in your mission to push through.
Building in public helps by creating trust and showing real progress.
🔥 ChaiNet's Hot Take: Conviction fuels founders past the dark days. If you’re unsure, either find conviction or rethink your mission.
Q: From a technical SEO perspective, how do you optimize for AI search?
Vincent: Traditional SEO basics still apply: accessibility, link structure, clean code. For AI, include stats, expert quotes, and citations to improve trust.
Content length matters less as AI providers tune algorithms.
80% of SEO is shared between AI and Google; 20% differs and requires tweaks.
🔥 ChaiNet's Hot Take: AI SEO is evolving, but foundations remain solid. Adaptiveness is key.
Final Thoughts: AI SaaS Success in 2025
Vincent Josse’s insights show that great AI SaaS products are built on strong foundations: solving real problems, smart tech choices, user focus, and persistence.
The AI revolution means founders must be practical and patient while constantly validating their mission and product with real users.
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