intervals.icu Alternatives

Start Here: You May Not Want To Leave

intervals.icu is the best value in endurance sport and we are not going to pretend otherwise on our own website. It is free for an individual athlete, it already models Critical Power properly, it draws a real power curve, it handles fitness and fatigue, and it lets you build custom fields and charts that most paid platforms will not. Teams and bulk athlete configuration need the $4 a month Supporter tier, which is still effectively free.

If you are here because someone told you a paid platform must be better, go back. It is not that simple.

Why People Actually Leave

The configuration cost. intervals.icu gives you the parts, not the finished thing. Getting it to the state you want means hours of setting up fields, charts and views, and those hours recur every time you want something new. If you enjoy that, it is free. If you do not, it is the most expensive thing about the platform, because the currency is your evenings.

The interface. This is the complaint we hear most and it is fair. The screens are dense, unforgiving and built by someone optimising for capability rather than comfort. Athletes in particular bounce off it, which matters if you are a coach — a tool your riders will not open is not helping you, however good it is.

The roster problem. It was built for the individual athlete first. Once you are coaching more than a handful of people, prescribing, chatting, assigning a library to several athletes at once and getting a roster view of who needs attention this morning is a different kind of work, and that is not what intervals.icu was designed around.

Nothing is set up for the athlete. A coach can learn a dense interface. Asking twenty athletes to is a different proposition.

First, What These Things Actually Are

Most comparison pages fail because they line up products that are not the same kind of thing and then argue about price. So before the list, the table above quotes what each of these calls itself, in its own words rather than ours. Read it before you read the prices.

Notice how few of these are the same kind of thing. If you are leaving a free analytics toolkit, the question is whether you want a deeper toolkit, or whether you want to stop assembling one.

The Alternatives

1. Vekta — the same physiology, already assembled

Full disclosure: this is our platform and this page is on our site, so judge the rest of the list on whether it is fair. We describe Vekta as the performance system behind the world’s best, built with the WorldTour. In plainer terms it is a performance model: it models what the body actually does — sustainable power, the finite reserve above it, and how both hold as fatigue accumulates.

The honest framing here is narrower than usual: we are not offering you more depth than intervals.icu. They already model Critical Power, and our usual argument against FTP-based platforms does not apply here. What we are offering is the same class of physiology with the assembly already done, and a workflow built for a coach and athlete together.

Intervals are detected automatically rather than configured. CP, W′, D′ and Pmax update daily from real sessions. Durability is measured in every ride. Every file arrives already analysed, and the athlete app is built so a rider actually opens it — peaks, trophies and a written summary after every session.

Concretely: intervals are detected by machine learning, climbs are detected automatically, and every session opens with peaks, zones, laps, durability, W′ Balance, torque and comparison already built. Zones update daily from recalculated CP, with a custom option if you want to set them yourself.

Cost: Coach account free at any roster size. Athletes €19.99/month or €179.99/year. The coach account being free at any roster size is the part that matters if you are managing thirty people.

Where it does not win: you cannot write your own formula. Vekta has custom zones alongside the adaptive ones, and the multi-stream chart is configurable, but if the thing you love about intervals.icu is defining a field nobody else has, we will frustrate you. That is a real trade rather than a hedge. We ship a considered set of tools; they ship a workshop.

2. Golden Cheetah — more depth, more work

Golden Cheetah states its purpose plainly: cyclists and triathletes should be able to download their power data to the computer of their choice and “analyze it in whatever way they see fit”. That sentence is the whole product, including its limits.

If you are leaving intervals.icu because you want even more analytical control, Golden Cheetah is the honest answer. Free, open source under GPL v2, actively developed, with Critical Power modelling, W′, programmable charts and now native Apple Silicon support in the 3.8 release.

Where it does not win: it is desktop software with no cloud, no coach–athlete sharing and no phone app. If your complaint about intervals.icu was setup time, Golden Cheetah is more of it, not less. It solves the depth problem and makes the workflow problem worse.

3. TrainingPeaks — the one most coaches move to, and the trade involved

TrainingPeaks describes itself as “your complete training platform”, and its own summary of what it does is “Plan. Train. Lift. Find your coach.” Worth noticing which verb is not in that list. It is a planner and a coach marketplace, and it is the best-established one in the sport.

If you are leaving because you need a shared coach–athlete workflow and a platform your peers already use, TrainingPeaks is the obvious destination and there is nothing wrong with that answer.

Cost: athletes $19.95 a month or $134.99 a year. Coaches $21.99 a month base, plus $9 per premium athlete per month with volume discounts from ten athletes. A thirty-athlete roster is roughly $265 a month.

Where it does not win: be clear-eyed about this one. You would be leaving a free platform that models Critical Power for a paid platform built on FTP and TSS. You gain workflow and ubiquity; on pure analysis you go backwards.

4. Final Surge — the cheap answer to the roster problem

Final Surge does not call itself a coaching platform. Its own page title calls it a “Workout Log for Athletes and Coaches”, and that is exactly what it is — a very good one. If the only reason you are leaving intervals.icu is that you now coach a roster and need shared prescribing, a calendar and communication in one place, this is the cheapest credible way to get it.

Cost: athletes are free — all athlete features, device sync, web and mobile apps. Coaches pay $19 a month for one to five athletes and $39 a month for up to a hundred, with 17 percent off annually. Coming from free, that is about as soft a landing as exists.

Where it does not win: this is the hardest trade on the page, and it is harder from here than from anywhere else. intervals.icu already models Critical Power, draws a real power curve and lets you build custom fields. Final Surge does none of that — there is no CP or W′ work, no power-duration modelling, no automatic interval detection. Leaving TrainingPeaks for Final Surge costs you very little analysis, because there was not much to begin with. Leaving intervals.icu for it means giving up genuine physiological modelling to solve a workflow problem. Go in knowing that.

5. WKO5 — if you want to keep building things

TrainingPeaks sells WKO5 as “Training and Analysis Software” that turns “analysis into answers”. It is desktop analysis software that sits on top of a subscription, and it is the deepest of its kind.

WKO5 is the natural home for the intervals.icu personality: someone who enjoys constructing their own view of an athlete. Best-in-class power-duration modelling, and $169 once with one licence covering the whole roster.

Where it does not win: it pulls athletes in through a TrainingPeaks coach login, so the real price is $169 plus a TrainingPeaks subscription underneath. It is desktop only, and your athletes never see any of it.

6. Xert — a live model instead of a configurable one

Xert describes itself as software that tracks and predicts, in real time, how much power you can produce at any point in a ride. It is a real-time fatigue model first and a training platform second, and the ordering is the whole product.

A different answer to the same instinct. Xert models your remaining capacity during the ride and tells you what you can still do right now.

Where it does not win: everything is expressed in Xert's own terms, which map onto nothing else. You are trading a platform you configure for a platform you must translate.

7. Runalyze — if you are mostly a runner

Runalyze is a free analysis site with a running bias, and the maintainers have said it stays free.

Worth knowing if the running side is what intervals.icu was not serving. Runalyze has been free for years and the maintainers have said it will stay that way, with a paid premium tier alongside. VO2max estimation, race prediction and marathon shape modelling are strong.

Where it does not win: it is running-led, and the interface is every bit as utilitarian as the one you are leaving. If the UI was your complaint, this does not fix it.

How To Choose

If your complaint is setup time and interface — Vekta. Same physiology, assembled, and an athlete app your riders will actually open.

If your complaint is that you want more control — Golden Cheetah or WKO5. Both give you more; both cost you more time.

If your complaint is the roster workflow — Vekta, Final Surge or TrainingPeaks, and the arithmetic is worth doing honestly. A Vekta coach account is free at any roster size; Final Surge is $39 a month for up to a hundred athletes with the athletes free; TrainingPeaks is $21.99 plus $9 an athlete. Final Surge is the cheapest and gives you the least analysis — from intervals.icu that is a real loss rather than a technicality.

If your complaint is only that it is free and that feels wrong — stay. Paying more is not the same as getting more, and intervals.icu is the clearest proof of that in the sport.

The Head-To-Head

If you have narrowed it down and want the direct comparison rather than the shortlist, we have written that separately: Vekta versus intervals.icu.

Also worth reading: WKO5 alternatives and TrainingPeaks alternatives.