Todoist Security Review: How Safe Is It?

Architecture is not an abstract detail with Todoist; it decides what is actually exposed when you use it. Work out three things before trusting it with anything sensitive: whether processing happens locally on your machine or remotely on theirs, exactly what data leaves your device to get there, and who has operational access to the infrastructure behind the parts of the product you cannot see or inspect yourself. No summary rating exists for this one, so the product's own security or architecture documentation is the only place the actual specifics are written down.

Ask two separate questions about Todoist rather than one: is data encrypted while travelling, and is it encrypted while stored, and if stored, who holds the keys. The last part is the one that matters most and the one marketing pages are vaguest about. Confirm it in the product's own security documentation before treating anything sensitive as protected.

A productivity product having reported vulnerabilities is not automatically a red flag; having no visible way to report one is. Look for whether Todoist publishes a security contact or disclosure policy and whether past issues were acknowledged and fixed openly, because that pattern predicts how the next issue will be handled better than any current clean record does.

Independent review is the difference between a security claim and a verified one. Check whether Todoist has published any third-party audit or assessment, when it was done, and crucially what scope it covered, an audit of one component is often quoted as though it covered the whole product. Recency matters as much as existence.

Turn two-factor authentication on the day you sign up for Todoist, not after something goes wrong, that single habit, paired with credentials you are not reusing on any other account, does more for your safety than any single toggle buried in settings. Give it only the access it actually needs to function, and put a reminder in your calendar to review what it is still connected to every few months, since that list only grows if nobody prunes it. Which of these have you actually set up today?