Intervals.icu
Intervals.icu is a free web-based training analytics platform for cyclists, runners, triathletes, and other endurance athletes, offering fitness tracking, activity analysis, workout planning, and integrations with 250+ third-party devices and apps, monetized via an optional $4/month Supporter subscription.
- Company typePrivate
- Founded2018
- HeadquartersLondon, United Kingdom
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Intervals.icu does
Intervals.icu is a free, web-based training analytics platform serving individual endurance athletes (cyclists, runners, triathletes, swimmers, rowers) and the coaches who manage them. The platform aggregates data from 250+ third-party integrations including Strava, Garmin, Wahoo, Zwift, Coros, Polar, Oura, WHOOP, Suunto, and Amazfit, and processes it through proprietary algorithms such as automatic eFTP estimation, multiple power-curve modeling approaches (Morton's 3P, Monod & Scherrer), cardiac decoupling analysis, and automatic interval detection with spike correction. The product surface spans fitness/fatigue/form tracking (CTL/ATL/TSB Performance Management Chart), activity timeline analysis, multisport support with sport-specific zones, a workout builder supporting Zwift (ZWO), FIT, MRC, and ERG formats, a training calendar, and a custom JavaScript extension layer for user-defined metrics and charts.
The underlying technology runs on Google Cloud with Backblaze and Wasabi for storage, hosted with data residency in Germany and Finland to support GDPR compliance. A full REST API with OAuth 2.0, webhooks, and MCP availability enables the integration ecosystem that functions as a distribution channel. The platform is offered free to all users with an optional $4/month Supporter subscription unlocking advanced features including the annual training plan builder, weather analysis, full Strava history import, route matching, teams and coaching organization tools, and early beta access. Customer acquisition is entirely organic, driven by word-of-mouth in cycling and triathlon forums, social media presence, and integrations with major fitness platforms; the company runs no paid advertising.
Intervals.icu Ltd. is a UK private limited company headquartered at 71-75 Shelton Street, Covent Garden, London, with the founder and lead developer based in Cape Town. The company was founded in mid-2018 by David Tinker as a side project and grew organically to 160,000+ active athletes analyzing 193M+ activities by 2025, supported by a seven-person core team and volunteer community moderators. As of September 2024 the founder works full-time on the platform; no external institutional investment, parent company, or public listing is disclosed.
Intervals.icu firmographics
Firmographics- Name
- Intervals.icu
- Legal name
- Intervals.icu Ltd.
- Website
- https://intervals.icu
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Intervals.icu is a free web-based training analytics platform for cyclists, runners, triathletes, and other endurance athletes, offering fitness tracking, activity analysis, workout planning, and integrations with 250+ third-party devices and apps, monetized via an optional $4/month Supporter subscription.
- Ownership category
- akta.pro rank
Intervals.icu industry classification
Industry- Product category
- Endurance Training Analytics
- NAICS
- Sports and Recreation Instruction (611620)
- SIC
- Services-Computer Integrated Systems Design (7373), Measuring & Controlling Devices, Nec (3829)
- akta.pro primary industry
- Endurance & Running/Cycling Training (HSADAAAG)
- akta.pro secondary industry
- Virtual & Hybrid Participation Events (App-Based, Remote/Hybrid Races) (MPAKAIAH)
Keywords
Where Intervals.icu is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Intervals.icu business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Infrastructure, Personnel, Technology or R&D, Operations
Revenue model
- Free Tier: Free access to core training platform features including fitness tracking, activity analysis, interval detection, training calendar, workout builder, power curve analytics, multisport support, device integrations, and custom charts. No credit card required.
- Supporter Subscription: $4/month Supporter subscription unlocking advanced features including weather analysis, annual training plan builder, full Strava history import, route matching, auto-flag commutes, customizable activity summaries, completely custom zones, CSV activity stream data upload, teams and coaching organization features, bulk athlete configuration, and early access to beta features.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Free tier with full core features |
| Subscription | Monthly | Supporter tier with advanced features |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Intervals.icu product offering
Product offeringCore offering
Intervals.icu is a free, web-based training analytics platform for cyclists, runners, triathletes, and other endurance athletes. It provides comprehensive training load tracking (fitness, fatigue, form), automatic interval detection, power curve analysis, multisport support with independent zones per discipline, workout building, and training calendar planning. The platform integrates with 250+ third-party apps via an open REST API and is offered free with an optional $4/month Supporter subscription.
Product overview
Intervals.icu is a free, unified online training platform for cyclists, runners, triathletes, and other athletes. The platform consists of core product modules organized into five main categories: Track Your Progress (Fitness Chart, Power Curve, Multisport, Activity Totals, Wellness Integration, Custom Charts, Power Rankings), Analyze Your Activities (Activity Timeline, Power Charts, Decoupling, Heart Rate Charts, Cumulative HR, Intervals Table), Plan Your Training (Custom Zones, Training Calendar, Workout Builder, Training Plans, Annual Plan Builder, Weather Forecasts), Communicate (Chat, Ask A Coach, Athletes Management), and Extend & Integrate (Open API, App Integrations, Custom JavaScript). The platform is free for all users with an optional $4/month Supporter tier unlocking advanced features including annual training plan builder, weather analysis, and early access to beta features. It integrates with 250+ third-party apps via open API and connects natively to major platforms including Strava, Garmin, Wahoo, Zwift, Coros, Polar, Oura, WHOOP, and others.
Differentiator
Problem solved
Functional benefit
Products and services
- Intervals.icu Training Platform Free web-based training analytics platform for cyclists, runners, triathletes, and other endurance athletes. Tracks fitness, fatigue, and form (CTL/ATL/TSB), provides automatic interval detection, power curve analysis, multisport support with independent zones, workout builder, training calendar, decoupling analysis, and chat for coach-athlete collaboration. Integrates with 250+ third-party apps via an open REST API. Free tier available; optional $4/month Supporter subscription unlocks advanced features.
- Tour de France 2026 Stage Dashboard Interactive dashboard dedicated to the Tour de France 2026, featuring stage-by-stage race profiles, elevation maps, routes, categorized climbs, weather forecasts, and race timings for all 21 stages. Built in collaboration with Science to Sport.com.
Quantifiable outcome
- Users report canceling paid alternatives like TrainingPeaks Premium in favor of Intervals.icu
- +1 more outcomes
Companies that use Intervals.icu
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles2 records
Intervals.icu technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration20 records
AI capability6 records
Feature10 records
Intervals.icu partnerships and signals
Strategic signalPartnerships
14 partnerships are on record, tiered minor and core.
- Science to Sport.comminorScience to Sport.com helped with the development of the Tour de France 2026 stage dashboard, providing performance expertise for the interactive race visualization features.
- StravacoreBi-directional integration enabling activity upload/download, historical data import, and workout sync with Strava.
- GarmincoreDirect integration for syncing activities, workout sync, and wellness data including weight, sleep, HRV, readiness from Garmin Connect.
- WahoocoreIntegration for syncing activities and workouts with Wahoo devices and ecosystem.
- ZwiftcoreIntegration for syncing activities and importing/exporting workouts in ZWO format.
- CoroscoreIntegration for syncing activities and wellness data with Coros devices.
- PolarcoreIntegration for syncing activities and wellness data with Polar devices.
- 250+ Third-party Apps and DeveloperscoreOpen API ecosystem with 250+ third-party integrations including coaching tools, indoor training apps, data sync apps, workout generators, and AI coaches. The community has built custom streams, charts, fields, and integrations.
- Google CloudcoreCloud infrastructure provider for hosting Intervals.icu services and data processing.
- OuracoreIntegration for syncing wellness data including sleep, HRV, and readiness from Oura Ring.
- WHOOPcoreIntegration for syncing wellness data from WHOOP devices.
- SuuntocoreIntegration for syncing activities and wellness data with Suunto devices.
- AmazfitcoreIntegration for syncing wellness data with Amazfit devices.
- HuaweicoreIntegration for syncing wellness data with Huawei devices via Huawei Health.
Scale indicators6 records
Recent moves6 records
Expansion highlights6 records
Intervals.icu competitors and assessment
Company assessmentDirect peers
- TrainingPeaks: TrainingPeaks is the long-established premium training platform for endurance athletes and coaches, offering similar analytics, workout builders, and coaching tools. Intervals.icu users explicitly report canceling TrainingPeaks Premium in favor of Intervals.icu, making it the closest direct competitor.
- Final Surge: Final Surge is a training platform serving coaches and athletes with workout planning, calendar management, and athlete communication. Directly comparable to Intervals.icu's coaching organization features.
- Xert: Xert provides advanced fitness analytics for cyclists with proprietary modeling algorithms (similar to Intervals.icu's eFTP and Morton's 3P). Direct competitor in the power analytics niche serving serious cyclists.
- Runalyze: Runalyze is a free training analytics platform for runners with comprehensive fitness tracking, similar to Intervals.icu's running features. Direct competitor in the running analytics space with overlapping capability set.
- Today's Plan: Today's Plan is a training analytics platform with FTP estimation, training load tracking, and workout planning for endurance athletes. Directly comparable feature set to Intervals.icu, particularly in cycling analytics.
- Selfloops: Selfloops is a training analytics platform for multi-sport athletes with similar fitness tracking, workout planning, and coach-athlete management features. Direct competitor in the endurance athlete analytics space.
Others
- Catapult Sports: Catapult provides sports performance analytics primarily for professional teams and athletes. While serving a different segment (team-based sports performance), it represents the broader sports analytics category that Intervals.icu operates within.
Broad incumbents
- Strava: Strava is the dominant social fitness platform for cyclists and runners with native activity tracking and growing analytics features. While broader in scope (social networking, all sports), Strava is a key data source and competitor in the analytics space.
- Garmin Connect: Garmin Connect is a free activity tracking and analytics platform bundled with Garmin devices. While primarily a device maker's software, it provides analytics that compete with Intervals.icu for casual users.
- Wahoo SYSTM: Wahoo SYSTM is an indoor training platform with structured workouts and analytics, part of the broader Wahoo ecosystem. It overlaps with Intervals.icu's workout builder and indoor training integration capabilities.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat6 records
Key risks5 records
Key highlights6 records
Customer concentration
Intervals.icu social profiles
Digital presenceIntervals.icu compliance and trust
Trust signalCompliance1 record
Intervals.icu financial estimates
Financial estimateRevenue estimate
Valuation estimate
Intervals.icu leadership team
Management profileNumber of profiles
Profiles7 records
Intervals.icu funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Intervals.icu M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Intervals.icu
What does Intervals.icu do?
Intervals.icu is a free, web-based training analytics platform for cyclists, runners, triathletes, and other endurance athletes. It provides comprehensive training load tracking (fitness, fatigue, form), automatic interval detection, power curve analysis, multisport support with independent zones per discipline, workout building, and training calendar planning. The platform integrates with 250+ third-party apps via an open REST API and is offered free with an optional $4/month Supporter subscription.
Is Intervals.icu a public or private company?
Intervals.icu is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Intervals.icu founded?
Intervals.icu was founded in 2018. It employs 1 to 10 people.
Where is Intervals.icu based?
Intervals.icu is headquartered in London, United Kingdom, in the Europe region.
How does Intervals.icu make money?
Two revenue lines are on record. Free Tier is the primary driver. The others are supporter Subscription.
Who are Intervals.icu's main competitors?
Direct peers on record are TrainingPeaks, Final Surge, Xert, Runalyze, Today's Plan and Selfloops. Catapult Sports is listed as an others. Broad incumbents are Strava, Garmin Connect and Wahoo SYSTM.
Does Intervals.icu have an API?
Yes. The Intervals.icu Open API provides full REST API access for developers and third-party apps. Every user can use their personal API key to call the API. OAuth 2.0 with granular scopes is available for third-party apps. Supports upload and download of activities in FIT, TCX, GPX, ZIP and GZ formats. Push and pull wellness data including weight, resting HR, HRV, steps and more. Create and manage planned workouts on the calendar. Webhooks for activity uploads, calendar updates and athlete events. External ID mapping for bidirectional integration with other platforms. Developer documentation is at www.intervals.icu/features/open-api.
What industry is Intervals.icu in?
Intervals.icu's product category is Endurance Training Analytics. Its primary akta.pro industry code is HSADAAAG, Endurance & Running/Cycling Training, with a secondary code of MPAKAIAH, Virtual & Hybrid Participation Events (App-Based, Remote/Hybrid Races). Its NAICS code is 611620 and its SIC code is 7373.