112 Fastest-Growing SaaS Companies in 2026

Among companies with public revenue, Higgsfield grew fastest: from $20M to $1B in ARR in about a year (50×). Anthropic appears most often in the growth rankings, named in 20 of the 46 ranking editions we track. There is no single answer: spend-based rankings and revenue figures measure growth differently, so this page shows both.

Two ways. Brex, Vertice, Ahrefs, Ramp and ARR Club rank software vendors by how fast their customers' spend or customer count grows, from card and bill-pay data across tens of thousands of businesses. Separately, each company's latest ARR (annual recurring revenue) or run-rate comes from its own announcement or reputable press, with a link. Where a figure from about a year earlier exists, the table shows the growth multiple.

Most sell software by subscription. The list also keeps the AI labs and AI infrastructure companies the rankings name, such as model providers and GPU clouds, because SaaS teams buy from them and sell to them. 94 of the 112 are AI companies.

Many fast-growing private companies don't publish revenue. They're on the list because a growth ranking named them; the table says 'Not disclosed' rather than guess.

Whenever a ranking publishes a new edition (Ramp monthly, Brex and Vertice every few months) or a company announces a new ARR figure. The current version is from November 2026.

Yes. They're in LeadWave's list of 15,000+ SaaS companies, with the CEO's name, verified email and LinkedIn, headcount and funding for each.