Preceden

Preceden is a browser-based timeline maker that Matt Mazur launched in 2010. He began it after working as an Air Force project manager and found that professional project timelines were hard to produce. You can draw a timeline by hand, import one from a spreadsheet, or have the Timeline Maker AI generate a draft from a prompt. For project work, the main tools are layers that separate workstreams, people, or teams, plus percent-complete tracking and dependency links between events. It also supports approximate dates, which appear as bars with faded edges, and the scale adjusts automatically from weeks to months. Finished timelines can be exported to PDF, PNG, PowerPoint, CSV, and Excel, shared by link, embedded in HTML, or shown in presentation mode. It suits consultants, project managers, small teams, and educators who need a clean timeline for stakeholders more than a full work-management system. Pricing is flat and not per seat. The Free plan allows unlimited timelines but only 10 events on each. Basic costs $10 a month billed annually or $25 billed monthly. It removes the event limit and the Preceden branding, and adds spreadsheet import. Pro costs $16 a month billed annually or $40 billed monthly, and adds collaboration, a custom logo, and a custom domain. Paid plans come with a 15-day money-back guarantee. The main limitation is that Preceden is a visualization tool rather than a project management suite. It has no task assignment, resource allocation, or native app integrations beyond exports and embeds. One reviewer also reported that there is no undo button.