Thunders: the AI testing revolution joins STATION F’s Future 40

A well-deserved recognition for disruptive innovation

Founded in January 2025, Thunders has just reached a major milestone by being selected among the Future 40 2025 at STATION F, the program that recognizes the 40 most promising startups within the world’s largest start-up campus.

This achievement comes only ten months after the company’s creation and just three months after announcing its 9-million-dollar pre-seed funding round.

For a company working in AI-powered software testing automation, this selection is far more than a symbolic reward. It opens doors, builds credibility with international clients and investors, and positions Thunders as a key player in a major digital transformation.

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Watch Thunders in action 🎥

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Why Thunders made it to the Future 40

Every year in November, STATION F reveals the Future 40, its annual list of the 40 best-performing startups on campus.

Chosen from over 1,000 startups, these companies represent the top 4% of STATION F each year and benefit from unparalleled visibility that accelerates funding, generates business opportunities, and facilitates recruitment.

The 2025 edition highlights a strong trend: 34 of the 40 selected startups have integrated AI at the core of their product. Thunders fits perfectly into this movement, applying artificial intelligence to a domain often overlooked: quality assurance, a critical link in the software delivery chain.

STATION F selects startups on five criteria:

• measurable growth;
• commercial traction;
• team quality;
• innovation;
• ambition.

Thunders checks every box: fast growth, solid funding, repeat founders with an impressive track record, and technology that truly stands out.

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Future 40: more than a title, a growth platform

The Future 40 offers more than recognition. It is a launchpad. STATION F activates its ecosystem to amplify visibility, credibility, and traction for the selected startups.

Key benefits include:

• increased media exposure;
• privileged access to investors;
• greater trust from Fortune 500 clients;
• the possibility of direct investment from the campus itself.

Previous editions have seen success stories such as Hugging Face, Interstellar Lab, and Fintecture emerge from the program.

Thunders, a success story in motion

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Experienced founders and a second win in sight

Thunders was born from the partnership of two experienced entrepreneurs, Karim Jouini (CEO) and Jihed Othmani (CTO). Both are the architects behind Expensya, a SaaS expense management platform acquired in 2023 by the Swedish fintech giant Medius for more than 120 million dollars.

That first success was more than an exit; it was a learning curve. The founders learned to move fast, read markets, and build products that solve real pain points.

After holding strategic roles at Medius, the rise of generative AI in 2023 and 2024 reignited their entrepreneurial drive.

They identified a massive, under-addressed problem: software quality assurance remained slow, complex, and often treated as a secondary function in tech organizations. This insight led to the creation of Thunders, launched in January 2025 between Paris and Tunis.

A clear mission: democratizing and reinventing QA

Thunders does not aim to improve what exists; it aims to redefine it. Its promise is simple: turn software testing from an operational constraint into a lever for quality and speed.

“With over 20 years of experience scaling software ventures, we’ve seen firsthand how slow, unstable, and unscalable testing can kill innovation and stall growth. We brought together some of the best AI engineers to fix this once and for all, for us, and for every team facing the same challenge. That’s what Thunders.ai is all about.”
— Karim Jouini, CEO and co-founder of Thunders

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The technology: how Thunders works

AI agents that think like experts

At the core of Thunders are AI Test Agents, or expert personas. These agents are not simple scripts. They are intelligent systems capable of reasoning, adapting, and simulating expert behavior across multiple domains:

• QA engineers identifying complex user paths and edge cases;
• Accessibility specialists detecting issues for users with disabilities;
• Security experts looking for vulnerabilities;
• Product owners validating business logic;
• DevOps engineers monitoring performance and infrastructure.

This agent-based approach represents a generational leap beyond traditional, rule-based testing tools.

Natural language interface

Thunders understands and executes instructions written in natural language. There is no need to learn a scripting language. Users can simply write:

• “Check that the sign-up form rejects invalid emails and displays an error message.”
• “Test the full payment process using a Visa card on mobile.”
• “Simulate a user experience that meets WCAG accessibility standards.”

Thunders handles everything: interpretation, execution, and maintenance. No code, no friction.

Self-healing and continuous adaptation

When an interface changes, most tools break and tests become obsolete. Thunders solves this with self-healing capabilities.

When a test fails, the AI agent analyzes the change, understands the new structure, and automatically adjusts the scenario. The result is less noise, less maintenance, and more reliability.

According to the Thunders team, this approach reduces testing time by up to 90 percent compared to traditional solutions while improving coverage and reducing false positives.

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A rapid journey: from creation to the Future 40

Thunders’ roadmap is clear and ambitious:

• End of 2025: expansion to mobile and desktop QA;
• 2026: launch of vertical AI agents for healthcare, fintech, and e-commerce;
• International expansion across Europe and North America;
• Long term: becoming the standard QA copilot for software teams.

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Conclusion: a symbolic and tangible victory

Thunders’ selection for STATION F’s Future 40 2025 is no coincidence. It is the result of a winning formula: experienced founders, a major unsolved problem, an innovative solution, perfect timing, and a massive market.

In just ten months, Thunders has grown from an idea into a globally recognized AI testing company, with paying clients, significant funding, and validation from one of Europe’s most respected startup ecosystems.

For STATION F, this selection reflects a broader truth: artificial intelligence is no longer a promise; it is a practical tool for transformation.

For Thunders, this is only the beginning. The thunder has just started to roll ⚡

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Follow us on LinkedIn for updates on our journey and the latest in AI-driven testing.

Thunders is a team of AI experts and QA enthusiasts who believe in making software testing more accessible. Born from countless late nights debugging flaky tests and watching teams struggle with automation scripts, Thunders emerged in 2025 from their Paris headquarters. Built with love between Tunis and Paris, the company reflects its founders’ vision of transforming complex testing processes into simple, intelligent workflows.

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