# userver-framework/userver

Production-ready C++ Asynchronous Framework with rich functionality

Repository: https://github.com/userver-framework/userver
Canonical: https://ross.abutalabs.com/products/userver
Homepage: https://userver.tech
Language: C++
License: Apache-2.0
License Family: permissive
Topics: async, asynchronous, coroutines, database-access, cplusplus, web, server, microservices, high-availability, http, http-server, http-client, grpc, mongo, postgres, postgresql, redis, framework, cplusplus-20, cpp20
Last push: 2026-08-26T12:42:55+00:00

## Health v2 (maintenance only)
Score: 92/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 78, longevity 100
- inputs: {"age_days": 1721, "days_push": 7, "days_rel": 64, "gap_med": 47.0, "n_releases_24m": 15}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2956, forks 405 (observed 2026-08-28T04:07:32.202670+00:00)

## What it is
userver is a production-ready open-source C++ asynchronous framework with coroutines for building microservices, services, and utilities. It provides transparent efficient I/O, async drivers for databases and protocols, and high-level components for caches, logging, tracing, and metrics.

## Use cases
- build high-performance C++ microservices
- serve HTTP APIs with async coroutines in C++
- access PostgreSQL, MongoDB, or Redis asynchronously from C++
- build gRPC clients and servers in C++
- consume Kafka or AMQP messages in a C++ service
- implement distributed locking and caching in C++ services
- write high-availability backend services with deadline propagation

## When to choose
- you need a production-grade async C++ framework for I/O-bound services
- you want built-in drivers for many databases and protocols in one framework
- you need on-the-fly configuration, metrics, tracing, and congestion control out of the box
- you want to avoid callback-heavy code via coroutines

## When to avoid
- your project is not in C++ or C++20
- you need a simple synchronous web server with minimal dependencies
- you prefer lightweight single-purpose libraries over a full framework
- your team cannot invest in learning a large framework's abstractions

## Facets
- artifact type: framework
- maturity: stable
- function: web-framework, http-server, http-client, database-driver, websocket, rpc, caching, logging, tracing, monitoring, concurrency, message-queue, serialization, middleware, routing, testing, configuration-management
- domain: web-development, backend, microservices, databases, developer-tools
- platform: cpp, cross-platform
- tags: coroutines, async-io, grpc, postgresql, mongodb, redis, kafka, high-availability, microservices-framework, deadline-propagation, linux, macos, docker

## Member repositories
- userver-framework/userver (main) score 92

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:32.202670+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:32:27.167252+00:00, confidence not recorded.
  - readme: https://github.com/userver-framework/userver (fetched 2026-08-28T04:07:32.202670+00:00, sha e867f4a688f0)
  - homepage: https://userver.tech (fetched 2026-08-29T09:47:37.350401+00:00, sha 576cddcf978a)
  - site_page: https://userver.tech/de/d6a/md_en_2index.html (fetched 2026-08-29T09:47:37.359347+00:00, sha c0d81141faf8)
- Data as of 2026-08-30T08:39:29.467469+00:00.