(Overleaf co-founder here.) As far as I know, we've never lost any user data. We take that very seriously. If you believe you have lost data on Overleaf, please

(Overleaf co-founder here.) As far as I know, we've never lost any user data. We take that very seriously. If you believe you have lost data on Overleaf, please contact our support team via www.overleaf.com/contact and we'll investigate.