Reddit plans to acquire Spell, a platform for running machine learning experiments founded in 2016 by a former Facebook engineer, for an undisclosed amount
Taylor Hatmaker / TechCrunch :
Context & Ripple Effects
Spell has been on a quiet path since its $15M Series A in 2019 led by Eclipse Ventures and Two Sigma Ventures: a collaborative platform for running machine learning experiments, founded by a former Facebook engineer. Reddit's plan to absorb it undisclosed marks the platform's first known move into owning ML tooling outright.
The acquisition reads as groundwork rather than a one-off. Months later Reddit bought contextual-ad firm Spiketrap (ad quality scoring and auto-bidding models), and by early 2024 it was monetizing its corpus directly through a reported ~$60M/year content-licensing deal with Google alongside a similar unnamed-AI-company agreement.
First-order effects
- Reddit gains Spell's experiment-running platform and its founding team in-house, shifting ML development from rented tooling to owned infrastructure at a time when its ads and recommendation systems are the core monetization levers.
Second-order effects
- Owned experiment infrastructure compounds with the Spiketrap purchase: better-trained prediction and bidding models raise ad yield, which is exactly what makes Reddit's inventory more valuable to the advertisers its later data deals court.
Third-order effects
- If the pattern holds, Reddit operates as both a buyer and a seller of AI capability — building internal ML stacks while licensing its content corpus to model trainers — turning user-generated platforms into paid suppliers of training data rather than just destinations.
The trend: Social platforms are vertically integrating machine learning infrastructure while simultaneously licensing their archives to AI companies, making content ownership the asset and ML tooling the multiplier.