FrogPilot is free, open-source driver assistance for your car, running on a comma device and adding dozens of features to openpilot. It’s experimental, a little froggy, and yours to shape however you like! Remember, stay attentive and always be ready to take over!
openpilot is free, open-source driver assistance software made by comma. It runs on a comma device, which mounts on your windshield and connects to your car through a car harness. On 335+ supported cars it steers to keep you centered in your lane and, on many of them, manages your following distance and speed, while you stay alert and ready to take over.
FrogPilot is a fork of comma’s openpilot that adds its own features and settings on top. It installs the same way and runs on the comma 3, comma 3X, and comma four. It’s highly experimental and unofficial, so always use it with care!
Everything below lives in your comma device’s Settings → FrogPilot menu. Take a few of them for a spin: flip a setting and watch what the car does.
The demos run with JavaScript, which is turned off here.
Steering that stays on when you tap the brake.
On stock openpilot, tapping the brake turns everything off, steering included. With this on, FrogPilot keeps steering the whole time cruise control is switched on.
Cruising. Steering and speed control are both on. Tap the brake.
Driving Controls → Steering → Always On Lateral
Chill on the open road, Experimental when it counts.
It cruises in Chill Mode and hands over to Experimental Mode, where the driving model picks the speed, only while a trigger applies.
Open road, cruising in Chill Mode at your set speed. Send something down the road.
Driving Controls → Gas / Brake → Conditional Experimental Mode
Slows for curves before you get there.
In Chill Mode, stock openpilot doesn’t slow for curves ahead. This sees them coming and slows down on its own, early and smoothly.
Open road at your set speed. Pick a curve and a profile, then send it.
21 mph through the tight back-road bend. Adaptive: starts at Standard and learns how you take curves.
Driving Controls → Gas / Brake → Curve Speed Controller
Works the gas and brake the way you would.
Gentle on the brakes, smooth off the line! Human-Like Following reads where the car ahead is headed, so FrogPilot eases off early and brakes softly instead of reacting late. Human-Like Acceleration builds speed the way a person does, holding back at low set speeds and easing off as it nears yours. Both are on out of the box.
FrogPilot45 mph · no brakes yet
Stock openpilot45 mph · no brakes yet
FrogPilot can start slowing early and ease gently into the stop.
An illustration of how Human-Like Following brakes, played up to show the difference. Not a recorded drive.
Driving Controls → Gas / Brake → Acceleration and Braking
Cruise at the speed limit, up to your set speed.
It follows the posted limit plus your offset, and your set speed is always the ceiling. Try raising it, reordering the sources, and changing the offsets!
No more fiddling with the set speed. It follows the limit, plus your offset.
55 limit + 10 offset = 65, capped at 60 mph (your set speed)
Speed Limit Source Priority
Speed Limit Offsets
FrogPilot has a separate offset for each range of speed limits, 0–24, 25–34, 35–44, 45–54, 55–64, 65–74, and 75–99 mph. The demo shows the one for the current limit.
Driving Controls → Gas / Brake → Speed Limit Controller
Dive into every setting below.
A simulation, drawn to show the idea. The Curve Speed Controller speeds and speed limit example come from FrogPilot. The scenery and other speeds are illustrative. The gas and brake demonstrations need a car where openpilot controls the gas and brake.
Tuning Level decides how many settings your device shows. How deep do you want to go? Pick a depth in the pond below to open it: each one lists the menus that gain settings there, and a tap on a menu shows what each of them does.
The depths open with JavaScript, which is turned off here. The link under the pond lists every feature on GitHub.
Depth 1 of 4 The surface
59 settings on your screen
“FrogPilot decides nearly everything for you.”
No matches at this depth
Depth 2 of 4 Shallow water
112 settings on your screen
“Recommended for most drivers.”
No matches at this depth
Depth 3 of 4 Deeper water
220 settings on your screen
“Extra fine-tuning once you know how your car drives.”
No matches at this depth
Depth 4 of 4 The bottom
260 settings on your screen, as one is replaced here by a finer setting
“Everything, including settings that can drastically change how openpilot drives.”
No matches at this depth
† Cars where openpilot controls the gas and brake * Select vehicles only Has a demo above You set Tuning Level on the device, in Settings → FrogPilot. See every feature on GitHub
With Custom Themes, download theme packs and mix and match their color schemes, icon packs, sound packs, steering wheel icons, and turn signal animations. And with Holiday Themes (on by default), FrogPilot dresses up for thirteen holidays through the year!
The holidays: New Year’s Day, Valentine’s Day, St. Patrick’s Day, World Frog Day, April Fools’ Day, Easter, May the Fourth, Cinco de Mayo, Stitch Day, the Fourth of July, Halloween, Thanksgiving, and Christmas. Some themes can appear from the Monday of the holiday’s week through the holiday itself.
Want your own? Build it with the Theme Maker in The Pond, FrogPilot’s settings page in your browser, and share it with everyone.
FrogPilot → Theme and Appearance → Theme
October 31st, 2026 Update
"Curve Speed Controller" gets new profiles, FrogPilot reads speed limit signs with its own camera, slowing down gets gentler, and The Pond is rewritten from scratch.
Read the update
FrogPilot and Your Data
What FrogPilot collects from your drives, why, what your device removes first, and how to turn it off.
Read the post
Connect the harness and mount the device with comma’s setup guide.
When the device asks what software to install, choose Custom Software and enter:
FrogPilot.download
Go for a drive!