About Stima

EV battery intelligence, purpose-built for markets where the grid is unreliable and every vehicle downtime costs real money.

Why Jason Built Stima

In 2023, Stima's founder Jason Gras spent six months embedded with a motorcycle taxi cooperative in Nairobi as part of a climate-tech fellowship. The cooperative ran 80 electric boda-bodas. Every week, two or three bikes went dark — battery pack failed, vehicle pulled off the road, driver lost a day's income.

The cooperative manager kept a handwritten ledger of which bikes were "bad." His accuracy was about 60%. The bikes he didn't catch were the ones that failed in the field, often late at night on routes where recovery was expensive.

Jason came back to Paris with a prototype: a small OBD-II dongle, a Python script running on a Raspberry Pi, and a Telegram bot that messaged the manager when a pack's voltage curve looked wrong. The cooperative's unplanned outage rate dropped by 40% in the first month. Stima was incorporated six weeks later.

See the Platform
Electric motorcycle taxi boda-boda fleet in Nairobi

Renew Capital

Renew Capital €2.2M

Seed Round — 2025

Renew Capital backs tech-enabled startups building critical infrastructure across 13 African countries. Their portfolio spans climate tech, fintech, and logistics — companies operating in markets that require products designed for local realities, not adapted from Western defaults.

Their investment in Stima is part of a deliberate thesis around electric mobility infrastructure: the hardware is arriving fast; the software layer to make it reliable is not.

What the funding built

  • SEM-1 hardware manufacturing (first 2,000 units)
  • Regional data centers in Nairobi and Lagos
  • ML model training on 18,000+ discharge cycles
  • Driver app localization in Swahili, Hausa, and French
  • Partnerships with Tuma Dispatch and FleetBoss Nigeria

Four principles that shape every decision

Design for the market, not for the pitch deck

Every Stima feature was tested with real operators in Nairobi, Lagos, and Kampala before it shipped. We don't add capabilities because they look good in a demo — we add them because a fleet manager asked for them at 6 AM before dispatch.

Data that arrives is better than data that's perfect

We built offline-first from day one. A telemetry reading that arrives 18 hours late after a 2G sync is more useful than an architecture that requires 4G LTE and silently drops data when the signal disappears.

Downtime costs real people real money

An EV boda-boda driver in Nairobi earns roughly $12–15 per day. A battery failure costs them at minimum one day's income, sometimes two. We measure our product success in avoided outages, not in dashboard pageviews.

Open data, closed security

Your fleet data is yours. We give you full API access, bulk export at any time, and a data deletion request process that completes in 48 hours. We encrypt everything. We do not sell or aggregate operator data for third parties.

Questions about how we work?

Jason responds personally to every inquiry from fleet operators.

Get in Touch