Similarweb reported Q4 2025 revenue of $72.8 million, up 11% year-over-year but slightly below guidance due to timing of two large LLM data-training contracts. AI-related sales represented 11% of revenue, up from 8% in Q2, reflecting growth in data licensing, Gen AI Intelligence product sales and chatbot partnerships.

Management highlighted the extended sales cycles for large AI deals, with two significant LLM contracts pushed into future quarters but remaining active in pipeline as potential multi-year revenue drivers. Executives noted that closing these deals would be key to achieving the high end of the 2026 revenue range.

The company generated approximately $13 million in free cash flow in 2025, marking its ninth consecutive quarter of positive cash flow. Net revenue retention was 98% overall and 103% for clients spending over $100,000 annually; the balance sheet showed $72 million cash and no debt at year-end.

For full-year 2026, management issued revenue guidance of $305 million to $350 million (midpoint growth of 10%), and non-GAAP operating profit guidance of $16 million to $19 million. The wide range reflects uncertainty around the timing and size of large AI agreements, with Q1 revenue expected at $72 million to $74 million.