Where data meets fitness
Kailo — AI fitness insights, finally.
Trusted by thousands of athletes
Free to start • Connect with Strava or Garmin
Your AI coach
Ask anything about your training.
Chat with an AI that knows your miles, paces, and recovery — your fitness data plugged into Claude or your favorite LLM.
Powered by ML
Know your finish time before race day
Your training data, continuously analyzed by our prediction engine, so your race goal is always within reach.
How 2:59 marathoners train
Data-backed training
Train smarter with data.
See how fast runners at your target pace trained—their 5K times, weekly mileage, and long runs.
Average Marathon Speed
Inspired athletes come to Kailo
Race day, live
No more guess-spectating.
Share a live link and friends follow every mile — watching your pace, distance, and route move in real time, and sending cheers that hit you mid-stride.
How It Works
Sync your training
One-click Strava or Garmin connection
AI training advice
Personalized to your data
Know your finish time
Updates with every run you log
Pace any course
Personalized to your fitness
Race day ready
Live tracking & shareable results
Sync your training
One-click connection with Strava or Garmin. Your entire running history, ready to analyze.
Personalized training advice
Connect your Kailo data with Claude or your favorite LLM to get personalized training through the Kailo Connector.
Know your finish time
Our methods predicts your race time within minutes of your actual time — and updates with every run you log.
Pace the course
Personalized course pacing lets you plan for how your body reacts to every climb and descent—it's your PR playbook for race day.
Cross the line, share the story
Live tracking for your crew during the race. Beautiful shareable results after.
Real predictions. Real races. Real results.
How Kailo helped athletes hit their goals
Simple Pricing
Start free, upgrade when you're ready
Premium
$10/month
- Everything in Base
- Course-specific pacing plans
- AI Chat for training advice
- Priority support
FAQ
No model is perfect, but we pride ourselves on leading the industry. Our early models were approximately 2x more accurate than competitors, and our newest SPT model has widened that gap to roughly 4x for marathon predictions.
Statistically, the SPT model yields less than 3% error for over half our users and stays under 5% for the vast majority.
Some error is natural as models evolve, but much of it stems from external factors currently outside our dataset—like race-day weather (heat, humidity, wind) or sleep. As we incorporate these features, our precision will only increase.
Other variables are harder to measure, such as shoe choice, fueling execution, or mid-race injuries. Data quality also plays a huge role; broken sensors or erratic heart rate data can impact results. Considering these real-world variables, a 3% margin of error is exceptional. We have found that the cleaner your heart rate data, the sharper your prediction.
If your predictions ever seem off, please reach out on Discord or email support@kailo.fit. It doesn't happen often, but when it does we genuinely want to hear about it. Your feedback helps us get better for everyone.
Kailo is free to start, but full feature access can be unlocked with a subscription.
RaceSPT uses your last 30 Strava activities, but the typical marathon race predictor uses your last 1-year of runs.
Yes, but most of our focus is on building tools for marathoners at the moment. The marathon is an aerobic event, so most training recommendations are transferable to shorter distances, usually by running less mileage.
Your data is your data. When you delete an account, we delete all your data. You also have the option to delete your data without deleting your account. We use your data in an aggregated way to improve our products, but users can opt out of this in the settings page.
No. Strava forbids us from training models on Strava data.