Developer tools

Celest

Website

Overview

Celest is a backend-as-a-service for Flutter and Dart developers. It empowers Flutter developers with the tools and capabilities they need to become full-stack developers. We are introducing "Cloud Widgets", a set of primitives which enable you to declaratively define every piece of your backend and infrastructure in Dart.

As the role of the front-end developer evolves towards full-stack proficiency, we recognize that existing tools have fallen short for those specializing in Flutter. Using the programming language and patterns Flutter developers already know from building their frontend, Celest enables developers to build and connect their apps to their backend with no additional tooling.

We enable Flutter developers to concentrate on building features and delivering value to their customers rather than learning additional domains and fragmenting themselves across disparate toolchains.

Company description As recorded 2026-09-20
LinkedIn GitHub
Developer toolsInfrastructureDevelopersDevelopersUsage & volume pricing

Founders & team

Previously Teo

Company history As recorded 2026-09-20
1team members reported
Source-reported As recorded 2026-09-15

Origins

Dillon has been a member of the Flutter community since 2018 and worked at AWS on the Amplify Flutter product for two and a half years. At AWS, he created the first comprehensive Dart SDK, aimed at helping Flutter developers connect their apps to AWS. This SDK received positive reception within the Flutter community. However, he identified a persistent challenge: Flutter developers were still facing difficulties in crafting their backends, since it required them to spread themselves across different toolchains and programming languages. Recognizing this gap, Dillon left AWS with the idea of creating a dedicated platform for Flutter developers to unlock their ability to build every part of their apps in Dart. He submitted an application to Y Combinator only an hour before the deadline and was accepted into the Winter 2024 batch. Now, he’s able to realize the vision started at AWS: significantly improving the Flutter development landscape.

Founder account As recorded 2026-09-15

News & product activity

Sources & observations

Hacker News

Profile depthverified profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedNot documented
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 2 of 6 areas documented

Source-based assessment · automated evidence rules

The retained text does not establish product availability or customer use.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesingle public sourcereachable websitedescriptive evidenceclassified market and modeldated product or funding activity
startup.observe Directory coverage · Sources & method