Free tier only
Free Alternatives to Eclipse GlassFish (2026)
Eclipse GlassFish has a free tier, but if it does not fit, Here are 6 API & Backend tools you can start using for free, ranked by how closely they match Eclipse GlassFish, with what each charges once you outgrow the free plan.
Closest free matches
Ranked by shared use cases, audience and stack with Eclipse GlassFish. Every tool here lists a free plan.
NitroStack is a platform for building, testing and hosting Model Context Protocol (MCP) servers. It combines an open-source TypeScript SDK, a desktop IDE called NitroStudio and a serverless host called NitroCloud.
ReefAPI is one gateway to 250+ live web-data APIs: e-commerce, social, real estate, jobs, travel, news, finance and company data. Clean JSON, free tier.
Orisift checks phone numbers, email domains, IP addresses and domains through one POST /v1/lookup endpoint and returns a verdict with its evidence.
Render is a San Francisco cloud platform for deploying web services, workers, cron jobs, static sites, Postgres and Key Value stores from a Git repo, and now Render Sandboxes: isolated Firecracker microVMs that give every AI agent its own computer, filesystem and snapshots.
LaunchDarkly is a feature management platform for shipping software and AI agents behind flags, with progressive rollouts, automated rollbacks and built-in experimentation.
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Free alternatives to Eclipse GlassFish: FAQ
Quick answers to common questions
Is Eclipse GlassFish free?
Yes, Eclipse GlassFish offers a free tier. The tools below are alternatives that are also free to start.
What is the best free alternative to Eclipse GlassFish?
NitroStack is the closest free match by shared use cases, audience and stack. ReefAPI, Orisift and Render are the next closest.
How were these free alternatives to Eclipse GlassFish chosen?
Tools are ranked by similarity to Eclipse GlassFish (shared use cases, target audience, tech stack and pricing model) and filtered to those whose listing shows a free tier, freemium plan or open-source edition. Where fewer than 2 close matches exist, popular free API & Backend tools fill the list and are labelled as such.
Building a free API & Backend tool?
List it free. Tools with a free tier appear on pages like this one.