Skip to content
100% free during beta

A running coach that knows you

AI-powered training plans, real-time coaching, and progress tracking - built around your body, your goals, your life.

Start training - it's free→

No credit card · No commitment · Cancel anytime

5K–42K
Any Distance
24/7
Available
AI
Powered Coach
[ Your Goal ]

What are you training for?

Whether it's your first 5K or a marathon PR, your plan is built for exactly where you are.

DIST.01
5K
Your first finish line
SELECT →
DIST.02
10K
Build real endurance
SELECT →
DIST.03
Half Marathon
The big milestone
SELECT →
DIST.04
Marathon
Go the full distance
SELECT →
DIST.05
Just Run
No race, just fitness
SELECT →
[ Why Pace Builder ]

Everything a personal coach does - without the price tag

Real coaching intelligence, not a static PDF plan.

SYS.01 // MEMORY

A coach that learns you

Every run teaches it more about your strengths, limits, and rhythm. Advice gets sharper over time.

SYS.02 // ADAPT

Plans that flex with life

Missed a day? Feeling tired? Your plan adapts automatically - no guilt, no wasted weeks.

SYS.03 // TRACK

See what matters

Pace trends, heart rate zones, weekly load, streaks - the numbers that actually predict progress.

SYS.04 // CHAT

Ask anything, anytime

"Should I run today?" "Why does my knee hurt after long runs?" Your coach is always a message away.

SYS.05 // TARGET

Race-day ready

Countdown to your goal race with a periodized plan - base, build, peak, taper. Science-backed.

SYS.06 // GUARD

Injury-aware training

Tell your coach about limitations. It adjusts intensity and flags risky volume spikes before they happen.

[ How It Works ]

From zero to race day in 4 steps

01

Tell us about yourself

Age, experience, goals, schedule - 2 minutes and your coach knows you.

02

Get your plan

A personalized 4-week training plan generated instantly by AI.

03

Run & log

Complete workouts, log your runs, and get instant feedback from your coach.

04

Watch yourself improve

Track progress week over week. New plan every 4 weeks as you level up.

Start your plan - free
[ Got a race on the calendar? ]

Pick your race, train for it - free

Find a 2026 race in your city, sign up - and your AI coach builds a 4-week plan around THAT race and its exact date. Completely free.

Browse 2026 races→

100% free. No card needed.

01

Find your race

Browse 450+ AIMS-certified 2026 races across 115 countries. Filter by city, distance, or month.

02

Sign up with the organiser

Register on the official race site. Grab your confirmation email or PDF.

03

Connect it to Pace Builder

Open the race page and start onboarding - your race and date pre-fill your plan automatically. No card.

04

Train with your AI coach

Free AI coaching and a 4-week plan built around your exact race date.

[ Pricing ]

One plan. Everything included.

No tiers, no upsells, no surprises.

Beta - Free
$0

Free while we're in beta. Early users keep a lifetime discount.

  • ✓Unlimited AI coach conversations
  • ✓4-week personalized training plans
  • ✓Workout logging with AI feedback
  • ✓Progress analytics & PR tracking
  • ✓Streak tracking & achievement badges
  • ✓Works on phone, tablet, and desktop
Get started - it's free

No credit card required

[ FAQ ]

Questions? Answered.

How do I start running as a complete beginner?+
Pace Builder is built for beginners. Tell us your fitness level during onboarding and we'll create a personalized plan that starts from wherever you are - even if you've never run before. The AI adapts to your pace, schedule, and how you're feeling.
Is this really free? What's the catch?+
No catch - Pace Builder is 100% free during our beta period. No credit card, no hidden fees, no feature gates. When we launch paid plans, beta users will get a lifetime discount.
How is this different from other running apps like Strava or Nike Run Club?+
Most running apps track your runs but don't coach you. Pace Builder is an AI running coach that builds personalized training plans around your age, fitness, schedule, and heart rate zones. It adapts every week based on how you're actually performing - not a static PDF plan.
Can Pace Builder help me train for a 5K or marathon?+
Yes - from couch to 5K all the way to marathon training. Pick your goal distance during onboarding and the AI generates a periodized plan: base building, speed work, peak, and taper. It adjusts automatically if you miss days or need to change your schedule.
Do I need a smartwatch or running gear?+
No. Pace Builder works in any browser on any device - phone, tablet, or desktop. A smartwatch helps with heart rate data but it's completely optional. You can log runs manually and still get full AI coaching.
How does the AI coach help me stay motivated?+
Your AI coach sends daily workout reminders, celebrates your streaks, gives instant feedback after every run, and generates a weekly progress summary. Choose between data-driven coaching or encouragement-focused style - the coach adapts to what motivates you.

Running tips in your inbox

Weekly workouts, running science, and coaching tips - free.

No spam. Unsubscribe anytime.

Your goal. Your plan. Your coach.

Stop training alone. Get a coach that adapts to you - not the other way around.

Start training - it's free→

Join the beta · No credit card · 2 minutes to start