The London AI avatar-video company's filed 2024 accounts show revenue up 82% year over year — on the way to $100M+ ARR and a $4 billion valuation in its January 2026 Series E.
2026-10-07 · by Moe Ameen
Synthesia, the London-founded AI avatar-video company, has posted a run of growth that moved it from a promising startup into one of the most valuable AI companies in Europe. Its filed 2024 accounts (Synthesia Limited, Companies House) report turnover of about £58 million for the year ended December 31, 2024, up 82% from £32 million the year before, alongside a pre-tax loss of around £59 million driven by heavy investment in headcount, research, and new offices. Treat the exact figures as a snapshot — independent trackers estimating Synthesia's revenue in dollars sometimes cite different growth rates than the official filed accounts.
The momentum carried into subscription revenue. Synthesia said it crossed $100 million in annual recurring revenue in April 2025, announced alongside a strategic investment from Adobe Ventures, and trackers put ARR near $146 million by September 2025. The company has pointed to net revenue retention above 140% — meaning existing customers spend substantially more year over year — and says more than 90% of the Fortune 100 are now customers, up from more than 70% in April 2025 and roughly 40% two years before that, across a base of 65,000+ accounts.
Investors re-rated the company on that trajectory. In late January 2026 Synthesia raised a $200 million Series E at a $4 billion valuation, led by GV (Alphabet's venture arm) with participation from Nvidia's venture arm NVentures, Accel, Kleiner Perkins, and NEA — roughly double the $2.1 billion valuation of its January 2025 Series D. The round also funded an employee secondary sale. The product underneath all this is the same core Synthesia makes its name on: paste a script, pick from hundreds of avatars or clone your own, and render a narrated talking-head video in 140+ languages, now extended with interactive avatars that can listen and respond.
The useful way to read this news as a creator is not "Synthesia is worth $4 billion" — it is "the market just confirmed that AI avatar video sells, and the technology to make it is now commodity-cheap." The part Synthesia's funding does not solve is the one you actually feel: a rendered avatar clip is a single file in one aspect ratio, metered against a monthly minute cap, with nothing built to distribute it. You can act on this trend today without an enterprise contract. [Kompozy](/) generates the same class of avatar video — a [Persona Short](/glossary/persona-shorts) narrated by a face-locked HeyGen avatar, or [Persona Frames](/glossary/persona-frames) composited into a brand-exact [HyperFrames](/glossary/hyperframes) template — metered by generation credits instead of video minutes, so a daily posting cadence is not rationed against a 10-to-30-minute ceiling.
Then it does the half the valuation does not buy. One idea becomes a full week: [Autopilot](/glossary/autopilot) burns in feed-native captions, reframes the clip to 9:16, 1:1, and 16:9, spins the same source into carousels, Quote Graphics, Photo Posts, a Blog Article, and an Email Newsletter — each held to your voice by the [Persona Brief](/glossary/persona-brief) — and schedules and publishes the set across eight social platforms plus blog and email behind a per-post review. Synthesia's growth is the signal that avatar video works; Kompozy is how a creator captures it as a published, on-brand content stream rather than a stack of exported MP4s.
Synthesia's filed 2024 UK accounts report turnover of about £58 million, up 82% from £32 million the year before. On the subscription side, it crossed $100 million in annual recurring revenue in April 2025 and reached roughly $146 million ARR by September 2025, and it has pointed to net revenue retention above 140%.
Synthesia raised a $200 million Series E in late January 2026 at a $4 billion valuation, led by GV with participation from Nvidia's NVentures, Accel, Kleiner Perkins, and NEA — roughly double the $2.1 billion valuation of its January 2025 Series D.
The growth is enterprise-driven. Large organizations use Synthesia to turn one script into localized, lip-synced training and comms video in many languages without reshooting, and existing customers expand spend year over year (net revenue retention above 140%). More than 90% of the Fortune 100 are customers.
Its momentum confirms avatar video is a real market, but the tooling is shaped for enterprise L&D: it meters by video minutes and stops at an exported file, with no clipping, carousels, captions, scheduling, or publishing. A creator who wants avatar video as part of a published, multi-format feed is better served by an engine like Kompozy that generates the video and then distributes it across platforms.