Inspiration
Personalized video is one of the highest-converting forms of B2B outreach, but creating unique videos for every prospect is slow and doesn't scale. We wanted to automate the entire workflow—from researching prospects and generating personalized content to producing, storing, and delivering AI-generated media—so founders can run highly personalized outreach without manual effort.
What it does
Nuncio transforms a prospect's LinkedIn or company URL into a personalized outreach package. It researches the prospect, generates a tailored script, creates AI-powered video [(HeyGen), audio narration and soundscapes (ElevenLabs), and thumbnails (GMI Cloud)], audio, and thumbnails, stores every asset durably in Backblaze B2, delivers a branded share page, and autonomously manages replies and meeting bookings.
How we built it
We built Nuncio with a Next.js frontend, a Python/FastAPI Genblaze worker, and Backblaze B2 as the durable storage layer. Genblaze orchestrates multi-provider media generation, while B2 stores every generated asset, metadata, and manifest. Grove provides immutable provenance, and Stripe, Turso, and Sentry power billing, persistence, and monitoring.
Genblaze orchestrates multi-provider media generation through a single composite pipeline — GMI Cloud for thumbnail images, ElevenLabs for TTS narration and ambient soundscapes — producing three assets across two modalities in one run with automatic B2 storage and provenance manifests.
Challenges we ran into
Our biggest challenges were integrating providers with different capabilities, handling expiring media URLs, and making the orchestration pipeline resilient. We solved these by persisting all generated assets in Backblaze B2, building graceful fallbacks for external services, and exposing pipeline provenance directly in the product instead of hiding it behind backend infrastructure.
Accomplishments that we're proud of
We're proud that Nuncio is a production-ready application rather than a prototype. We built a true multi-provider AI media pipeline with durable asset storage, tamper-evident provenance, and a live autonomous workflow that handles personalized outreach from research through delivery and follow-up.
An autonomous agent can run the full cycle unattended — researching prospects, generating media, delivering outreach, classifying email replies, and booking meetings via Stripe — with every generated asset persisted to B2 and anchored in provenance.
What we learned
We learned that AI orchestration is most valuable when paired with durable storage. Backblaze B2 became much more than a file store—it serves as the source of truth for generated assets, metadata, and manifests, while provenance and private asset delivery make the entire pipeline reliable and auditable.
What's next for nuncio
Next, we want to add a HeyGen adapter to Genblaze so the video render itself runs inside the same composite pipeline as the thumbnail, soundscape, and narration — unifying all media generation under one orchestration run."
Log in or sign up for Devpost to join the conversation.