Introducing Calyphi
Calyphi builds open, browser-first tools for researchers. Rigorous statistics, zero data collection, no subscriptions. Start with CurveFit — more instruments coming soon.
Scientific curve fitting — instant, accurate, private.
GraphPad Prism costs €520 /year. Origin, SigmaPlot, and MATLAB carry similar price tags. For researchers who just need to fit a curve — especially in labs with tight budgets — that's hard to justify.
Meanwhile, free alternatives are either too basic (no model selection, no error estimation) or too complex (scripting in R or Python for every dataset).
Calyphi CurveFit gives you publication-ready fitting in seconds — for free, with no sign-up, and with complete data privacy.
From linear to Hill, Michaelis-Menten, sigmoidal, power-law, and custom equations.
Gold-standard nonlinear regression with multi-start to avoid local minima.
Akaike weights rank every model — no guessing which curve fits best.
≈95 % CI on parameters and prediction bands on the curve, automatically.
Runs entirely in your browser. Zero data ever leaves your device.
Paste data, pick a model, get results. No install, no account, no waiting.
No account. No install. Paste your data and get results in seconds.
Try CurveFit — Free