Startup Buildathon India 2026Open Innovation

RunFolio

Every race, read by AI.

Sanket Tambare · Pune
runfolio.in · live today

Pitch deck · 12 splits

The AI race companion for India's 2.5M runners.

Snap a finisher certificate and the race is logged. Get a race-day plan built for the course, the heat and your own history. Then a debrief, and a poster worth sharing.

GeminiNano BananaGemini LiveGoogle Cloud

RunFolio · Buildathon 2026KM 0.0 · 01 / 12

The problem

India races more than ever. Runners remember less.

Organiser websiteResults page, 404 next year✕

Timing companyCertificate PDF✕

Camera rollBib photo, 4,000 pics deep✕

WhatsApp club groupResults screenshot✕

Race-day planA generic chart, at 30 °C✕

1

Scattered history

Results live with whoever timed the race. Nobody, the runner included, holds the complete record.

2

Guesswork race days

Pace charts ignore heat, humidity, hills and your own past splits. Runners find the fade at km 30 instead of planning for it.

3

No debrief

Strava and watches log every run but never understand a race, and many runners don't own a watch at all.

The problem02 / 12

Why now

A running boom with no memory layer.

65K+

Tata Mumbai Marathon runners in 2025. It started with 19,000.

1,000+

organised road races across India every year, many now in Tier-2 towns

$4.8B

Indian running-gear market by 2033, double 2024's $2.4B (IMARC)

+59%

year-on-year growth in running-club activity on Strava in India

Sources: Procam International via Forbes India and Local Samosa (2.5M participants a year); ThePrint (small-town marathons); Social Samosa; IMARC via Local Samosa. Organiser and industry figures are indicative, not audited.

Why now03 / 12

Who it's for

Three start corrals.

Corral A · primaryB2C

A

The race runner

25–45, urban professional, 3–10 races a year from 5K to ultra. Phone-first, in a run club, often without a GPS watch.

Wants: A PB, a strong finish in the heat, and a journey worth showing.
Pays for: Unlimited AI imports, a plan and debrief for every race, HD posters.

Corral BB2B-small

B

Clubs & coaches

20–200 runners each, coordinated over WhatsApp and spreadsheets.

Wants: Every member's race history, plan and debrief in one roster.
Pays for: A monthly club seat.

Corral CB2B

C

Organisers & timers

Race organisers and timing companies whose results die in a PDF.

Wants: Results that get shared, and runners who come back next year.
Pays for: A branded poster and runner page for every finisher.

Who it's for04 / 12

The solution

One loop. Five checkpoints.

01

Capture

Photograph a certificate, bib or results screenshot. The race is logged.

Gemini · vision

02

Plan

Per-km pacing for this course, this forecast and your history.

Gemini · tools + grounding

03

Race

A printed pace band, or a voice pacer in your ear.

Gemini Live

04

Debrief

Plan against actual: where you faded, why, and what to change.

Gemini · reasoning

05

Share

A finisher poster and a portfolio page, which bring the next runner in.

Nano Banana

The rule

Every number comes from a deterministic, cited formula that's already live on RunFolio. Gemini explains it and personalises it. It never invents a pace.

The solution05 / 12

Current prototype · runfolio.in

Already on the course.

Runner profile

The split planner tool: pick a race, a goal time and a strategy

1

Shareable race portfolio. Photos first, PBs and stats computed for you, grid, ledger and stats views, all on one link.

6

Free tools, no login. Pace, splits, race predictor, training plans and TMM/Khadakwasla blocks, each with its method and sources cited.

OG

Share cards generated per race, so links unfurl with your name and time.

523

Unit tests, row-level security on every table, and pages that work with JavaScript off.

Current prototype06 / 12

AI feature 01 · Capture

Snap the certificate. It's logged.

City Half Marathon · 2026

Certificate of
Completion

A. Runner

CATEGORY21.1 K

NET TIME01:57:42

BIB4127

GUN TIME02:01:10

RANK812

DATE14.12.26

TIMING
PARTNER

→Gemini
Flash
· vision ·

New race · confirmJSON schema

EventCity Half Marathon0.98

Date2026-12-140.97

Distance21.0975 km0.99

Net time1:57:420.99

Bib41270.95

Splits10K 55:310.71 ⚑

Any layout, any languageConfidence for every field; low scores flaggedThe runner confirms; nothing auto-publishesBulk: 30 photos → Vertex batchNo watch needed

AI · Capture07 / 12

AI feature 02 · Plan

A plan for this race, not a race.

Pace band · half marathon · exampleGoal 1:55 · heat-adjusted

Start 06:0027 °C → 31 °C82% humidity+64 m climb, km 12–14Gel · km 7 · 14

≈1:57:54 finish

Honest about the heat: about three minutes slower than the cool, flat-course maths, and on purpose.

How it's built

Gemini calls RunFolio's own cited calculators for every number, grounds on course elevation and the forecast, and reads your last five races' splits.

Then it explains

"You faded 6% after km 15 in your last two halves. Bank nothing early. The climb is where we hold back."

AI · Plan08 / 12

AI features 03–06 · After the line

Debrief. Coach. Share. Talk.

03 · DebriefGemini

Plan vs actual

Finds where it went wrong and why: heat, the hill, or a start that was too fast.

Buildathon scope

04 · CoachGemini

Can I go sub-4:30 at TMM in January?

Your Pune half (1:57) predicts about 4:05 on paper (Riegel). In Mumbai's humidity, 4:25–4:30 is realistic. Here's a 9-week block…

AI coach

Knows your whole race history, with context caching to keep it cheap. It builds the next block and gives an injury caveat every time.

FINISHER · MUMBAI5:05:5342.195 KM · RUNFOLIO.IN

Finisher posters

Your race photo plus your verified result, made into a poster. This is the moment people share, and what organisers pay for.

Buildathon scope

06 · VoiceGemini Live

Race-day voice

A hands-free pacer on race morning and a spoken debrief afterwards. A year-in-review reel scored with Lyria.

Roadmap

AI · After the line09 / 12

Technical architecture

All on Google Cloud, Mumbai first.

asia-south1 · Mumbai · DR in asia-south2 · Delhi

ClientRunnerPhone browser, desktop, no app install

EdgeLoad BalancerCloud CDN · Cloud Armor

AppCloud RunAstro SSR, autoscaling, min instances up on race weekends

DataCloud SQLPostgres, row-level security kept

AuthIdentity PlatformEmail + Google sign-in

FilesCloud StoragePhotos, certificates, posters, signed uploads

InsightBigQueryAnonymised city and race trends

AsyncPub/Sub → WorkersAbsorbs the post-race spike: 65K finishers, one morning

AI · Vertex AIGemini · Nano Banana · LiveStructured output, function calling over our calculators, Search grounding, context caching, batch prediction

OpsScheduler · SecretsMonitoring, budget alert for every AI call

Architecture10 / 12

Competition · business model

A different race. A clear way to pay.

	Strava + Runna	Watch apps	Registration sites	RunFolio
Built around races, not runs	—	—	½	●
Works with no watch	½	—	●	●
Whole history across organisers	½	½	—	●
Heat-aware plan for a named race	—	½	—	●
Cited, deterministic numbers	—	½	—	●
Indian pricing and context	—	—	●	●

● yes · ½ partly · — no. This is our reading of public features as of November 2026.

Free

₹0

Portfolio, manual logging, every calculator, and a few AI imports and plans a month. The growth engine.

RunFolio Pro

₹999/yr

Unlimited imports, a plan and debrief for every race, the AI coach, HD posters. Or ₹149 a month.

Clubs & coaches

₹2–5K/mo

Roster of members' races, plans and debriefs.

Organisers

per finisher

Branded posters and runner pages sent with results. Later: registration affiliates and sponsored cards.

Competition · Business11 / 12

Roadmap · founder · the ask

The finish line is the start corral.

Now · live

Race portfolio + 6 cited tools

runfolio.in: profiles, photos, stats, share cards, /explore.

20–21 Nov · City Buildathon

Certificate-to-race + race-day planner

Gemini on Vertex AI, Cloud Run workers, the first Nano Banana poster.

Dec 2026 – Jan 2027

Move to Google Cloud · TMM 2027 pilot

Plans before Mumbai, debriefs and posters after it, for the runners in our network.

Q1–Q2 2027

Pro, clubs, the first organiser

Gemini Live pacer, Hindi and Marathi debriefs, the first organiser paying per finisher.

Founder · soloPune

Sanket Tambare

Software developer and marathon runner: 26 races, 589 km of them logged on RunFolio, and a training partner at United Enduros. He built RunFolio's live product alone, end to end.

The user and the builder are the same person.

The ask

Google AI and Cloud credits to run Gemini at race-day scale, mentors on Vertex AI, and introductions to two race organisers for a poster pilot.

runfolio.inKM 42.2 · 12 / 12