ToolVitals

API Development & Testing

Alternatives to Kumo

Compare healthier or more active tools in the same use case using ToolVitals public evidence.

View Kumo profileView API Development & Testing leaderboard

Why compare

Signals behind this alternatives page

  • Maintenance and shipping signals are strong.
  • Health score: 96/100.
  • Shipping score: 92/100.

Switching guide

Best alternatives by need

Best overallTraefik

Highest organic ToolVitals fit for this use case.

Healthier optionsTraefik, Scalar, LiteLLM, new-api

Stronger current public-health signal than Kumo.

Verified open/source-visibleTraefik, Scalar, LiteLLM, Bruno

Useful when portability and inspectability matter.

License unknown, source-visible signalsNango

Public source signals exist, but ToolVitals has not verified the license class.

Trust note: Sponsors and affiliate links are separate from rankings. ToolVitals does not let monetization change scores, risk labels, organic ordering, or evidence display.

Ranked alternatives

Best-fit api development & testing options

12 tools
02

Scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

Active
Health100
Shipping100
Score100
Confidence100
Stars15.8k
ModeSource-visible project
View profileCompare with Kumo
03

LiteLLM

Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]

Active
Health98
Shipping98
Score99
Confidence100
Stars55.1k
ModeSource-visible project
View profileCompare with Kumo
04

Bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Active
Health93
Shipping95
Score95
Confidence98
Stars46k
ModeSource-visible project
View profileCompare with Kumo
05

new-api

A unified AI model hub for aggregation & distribution. It supports cross-converting various LLMs into OpenAI-compatible, Claude-compatible, or Gemini-compatible formats. A centralized gateway for personal and enterprise model management. 🍥

Active
Health95
Shipping100
Score97
Confidence92
Stars43.9k
ModeSource-visible project
View profileCompare with Kumo
06

Insomnia

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

Active
Health91
Shipping95
Score95
Confidence100
Stars39.9k
ModeSource-visible project
View profileCompare with Kumo
08

Bifrost

Fastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 µs overhead at 5k RPS.

Active
Health98
Shipping100
Score99
Confidence100
Stars6.9k
ModeSource-visible project
View profileCompare with Kumo