Rewriting communication between human and machine
30+
Years experience in natural language processing
250M+
Words corrected and continuously added to our ever-growing corpus.
200K+
Professionals who already use our correction engines to elevate their writing
Our values
Technology
We firmly believe that the key to exceptional language performance starts with cutting-edge technology. By delivering truly forward-thinking solutions, we help our users to unlock the full potential of the latest tech to improve the quality of their written communication.
Performance
Speed is of the essence. Our tools are built to provide instant corrections, wherever and whenever you need them.
Usability
Reinventing the writing experience is our core focus. We craft intuitive, accessible tools that remove friction and redefine how users engage with writing, built on simplicity, clarity, and ease of use.
People
Behind our tech is a dedicated team of passionate people, driven by a love of language and a commitment to our users.
Meet the team
Arthur Ollier
Co-founder & CEO
Wanda Rzewuski
Co-founder & Head of Linguistics
Roger Raneiro
Co-founder & Head of R&D
Eric Ly
Co-founder & CTO
Looking for your next big opportunity?
MerciApp is hiring – come join us!
Hervé Droit
Co-founder & CTO
Nathan Thomassin
Cofounder & Head of Design
MerciApp truly is one of a kind
Powered by 30 years of linguistic engineering research, our high-performance analysis engines, approved by over 200,000 writing professionals.
715,000
Word forms
1.5 million
Word combinations
3,000+
Semantic rules
10,000
Syntax rules
300,000
Word senses
200+
Typographic rules
200,000
Nodes in our ontology
250 million
Words in our corrected corpus