Live tools
Try it right here
Everything below runs on this page. No sign-up to look around.
The source
The Internet Archive's Wayback Machine has saved billions of pages since 1996. Its availability API answers one question: which saved copy is closest to a date? Strata asks it once per year and keeps the distinct answers. The Archive may hold many more copies in between; open any version to browse them all.
What is different from Unlost
Unlost history (mobleysoft.com) rebuilds a company's own sites from its deploy records, backups and git. Strata does the public half, for any page on the web, with nothing to install.