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Case studies / TanglishCaptions

TanglishCaptions

An AI subtitle platform for Tanglish videos, co-owned 50-50 with SaaS creator Sanjeev N C. We built the models, the alignment and the GPU infra.

ClientOur product
What we didAI SaaS · Custom models
Year2025
TanglishCaptions — AI SaaS · Custom models

Services

Not a client project — we co-own it. Custom AI models, alignment algorithms, GPU infrastructure and the product.

The problem

Subtitling a Tanglish video took an editor around four hours, and no existing tool aligned Tanglish subtitles accurately.

Who it’s for

Long-form creators making Tanglish videos who need subtitles without losing hours.

What we built

Our own model for aligning Tanglish subtitles, running on our own GPU infrastructure — no off-the-shelf tools.

LGS craft

The hardest engineering problem we've worked on. We read research, spoke to professors and AI4Bharat contributors, then cracked a custom algorithm.

Then we chased speed: four hours became one, and with infra optimisation and parallelism, ten minutes.

Outcomes

  • 4 hours → 10 minutes per video.
  • Close to 1,000 users.
  • 10+ paying customers, 2 enterprise customers.

Stack

Custom ASR modelsAlignment algorithmsGPU infra