Comparison
First, an honest question, because it decides everything: are you a developer who wants to embed a file-import experience into your own product, or an ops person with one messy export to clean before a CRM import? Flatfile is built for the first job and is genuinely good at it. Sift is built for the second. If that is you, Sift cleans and dedupes your file in the browser, free, with nothing uploaded.
Clean your file in Sift, free →
Flatfile is an embeddable data-import SDK for SaaS product teams. You are a developer, and you integrate Flatfile so that your customers can upload, map, and validate their files inside your product's onboarding flow. It is infrastructure you build on, not a tool you open to clean a file.
That is a real, valuable job, and for it Flatfile (or OneSchema) is the better tool. It also prices like enterprise infrastructure. Flatfile does not publish rates; the pricing page routes to a sales call. A swovo.com analysis puts entry pricing at roughly 6,000 dollars a year, scaling to 50,000 dollars a year or more. G2 reviews include complaints about reliability. That is the trade-off of adopting a platform, and it makes sense when import is a feature of the product you ship. It makes no sense when you just have a file to clean.
Sift is a standalone file cleaner for the person, not the product. You are in ops, revenue operations, or marketing, you just pulled a messy export out of one system, and you need it clean and deduped so it imports into your CRM today. No integration, no sales call, no annual contract. You drop the file in, approve each fix with a before/after diff, and export a clean file. It is free and it runs entirely in your browser.
Be honest with yourself about the job. If you are building software and you want your own users to import their data through a polished, validated onboarding flow inside your product, that is an embedding problem, and Sift cannot help. Sift has no API and does not embed into apps; it is a tool a person opens, not infrastructure you build on. For that job, Flatfile or OneSchema is the right choice, and worth the price. Sift is for the other job: one person, one messy file, cleaned and imported now, for free.