Kasi vs Vertical
Side-by-side comparison of features, pricing, ratings, and alternatives.
Kasi is a running coaching app that delivers real-time audio coaching during a workout, rather than just handing runners a static plan to follow alone. Users can choose an AI-powered coach or a remote human coach who observes biometric data live and speaks instructions into the runner's ear as the workout unfolds, aiming to teach technique and pacing in the moment rather than only after the fact. Runners enter a recent race time and the app calculates target paces for different workout types, then adjusts guidance in real time. Training programs cover distances from 5K through marathon, along with menstrual-cycle-aware training and runner-specific strength work. The brand name comes from the Swahili word for speed.
Vertical is a science-driven adaptive running coach that leverages AI and personal data to create customized training plans. It distinguishes itself from generic apps by integrating real-world coaching experience and a deep understanding of exercise science, including periodization, load management, and recovery protocols. By combining data from wearables with direct user input on feelings, goals, and life circumstances, Vertical ensures training plans are realistic and adaptable, aiming to reduce injuries and setbacks. The platform offers a conversational approach where users can discuss their goals, injury history, and preferences with the AI coach, leading to a collaborative plan-building process. It adapts dynamically to missed workouts, fatigue, or changes in schedule, ensuring the user never "fails" a plan, but rather has it intelligently reshuffled.
Vertical offers a free training assessment and a PRO subscription at $25 per month after a 7-day free trial.
- Real-time in-ear coaching is a distinct approach versus static plan apps
- Option to use an actual remote human coach, not just AI
- Training plans cover a full range of distances
- Free trial available before committing
- Personalized and adaptive training plans based on user data and scientific research.
- Integrates wearable data with subjective user feedback for holistic coaching.
- Conversational approach allows for plan customization and flexibility.
- Focuses on injury prevention and sustainable training.
- Subscription cost adds up compared to free running trackers
- Human coach tier is priced separately and higher
- Newer entrant competing against more established running-coach apps
- Android availability isn't clearly confirmed on the homepage
- Subscription-based for full features after a trial period.
- Reliance on wearable data means users without devices may have a less optimized experience.
- The AI coach, while advanced, may not replicate the nuanced intuition of a human coach for all users.
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The Verdict
AI-generated from listing dataKasi offers real‑time audio coaching (AI or live human) during runs, while Vertical provides AI‑driven adaptive plans with wearable integration; choose based on whether you need live in‑run guidance or data‑rich plan adaptation.
Key differences
- •Kasi delivers live audio cues mid‑run; Vertical adjusts plans after runs based on data.
- •Kasi includes optional remote human coach; Vertical relies solely on AI.
- •Vertical integrates HRV, sleep, and major wearables; Kasi has no listed integrations.
- •Pricing model: Kasi is subscription‑only (cost unspecified); Vertical has a free tier and $25/mo PRO.
- •Kasi mentions menstrual‑cycle‑aware training; Vertical does not.
Pricing & value
Vertical offers a free assessment and a $25/month PRO, whereas Kasi only has a paid subscription with no price disclosed.
Ease of use / learning curve
Kasi’s core experience is live audio cues, a simple on‑run interaction; Vertical requires setup of wearables and post‑run analysis.
Features & depth
Vertical provides adaptive scheduling, wearable data fusion, and scientific research base; Kasi focuses mainly on real‑time audio coaching.
Integrations & ecosystem
Vertical lists integration with Garmin, COROS, Suunto and uses HRV/sleep data; Kasi lists no integrations.
Collaboration
Kasi offers a remote human coach tier for direct human collaboration; Vertical has only AI interaction.
Scalability
Vertical’s AI model can serve unlimited users via its app; Kasi’s human‑coach tier may be limited by coach availability.
Support
Kasi provides in‑app support and a human coaching tier; Vertical only mentions standard app support.
Choose Kasi if…
Runners who want live, in‑run audio cues and optional human coaching.
Choose Vertical if…
Runners who prefer data‑driven, adaptive plans with wearable integration.
Common questions
What is the cost to start using each app?
Vertical offers a free training assessment and a 7‑day free PRO trial; after that it costs $25/month. Kasi requires a paid subscription; exact price not provided.
Can I get real‑time coaching during my run?
Yes, Kasi provides live audio coaching (AI or human) during runs. Vertical only adjusts workouts after the run.
Do I need a wearable device to use the app effectively?
Vertical’s full features rely on wearable data (HRV, sleep, etc.) and integrates with Garmin, COROS, Suunto. Kasi does not list any wearable integrations.