At a glance — how these 4 alternatives compare
Our read on each project's adoption, maintenance activity and commercial-use risk, derived from GitHub signals and SPDX license terms rather than star count alone. Sorted by stars. How we score.
| Project | Adoption | Maintenance | Commercial use |
|---|---|---|---|
| ★ 32,996 · Ruby | Flagship | Active | Unknown risk No clear SPDX id — treat as all-rights-reserved until verified |
| ★ 18,451 · CSS | Mainstream | Maintained | Unknown risk No clear SPDX id — treat as all-rights-reserved until verified |
| ★ 5,694 · Ruby | Mainstream | Active | High risk Even a hosted/modified deployment can trigger source release |
| ★ 4,355 · PHP | Established | Active | High risk Even a hosted/modified deployment can trigger source release |
The alternatives
chatwoot
Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬
chatwoot/chatwoot Updated 2026-06-20 community-skeleton
UVdesk Open Source Community Helpdesk is a comprehensive ticketing support system designed for everyone, offering robust features to streamline customer support and collaboration.
uvdesk/community-skeleton Updated 2025-10-01 zammad
Zammad is a web based open source helpdesk/customer support system.
zammad/zammad Updated 2026-06-19 freescout
FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)
freescout-help-desk/freescout Updated 2026-06-19 Editor's take
Yusuke Morinaga · last revisited
Zendesk is enterprise support tooling. The OSS options here are honest about being smaller than that — believe them.
Zendesk is a heavyweight: multi-channel ticketing, routing rules, macro automation, SLA management, a knowledge-base product (Guide), agent analytics, voice. The open-source projects below are good tools, but it would be dishonest to call any of them a feature-for-feature Zendesk replacement at the enterprise tier. The realistic question is whether your Zendesk usage was enterprise-shaped — heavy routing, SLAs, deep reporting — or whether you were a growing team using a fraction of it and paying enterprise prices. The answer changes which of these (if any) fits.
Chatwoot — best if “support” meant live chat and shared inboxes
Chatwoot (29.6k stars, Ruby, pushed 2026-05-21) is the most modern and active
project here, and the right pick if your support is conversation-first: a chat
widget, email, social channels, a shared agent inbox. Where it is honestly
behind Zendesk is exactly the enterprise machinery — ticket routing rules,
macro automation depth, and SLA management are lighter than Zendesk’s. It
targets growing teams, not enterprise support operations, and it does not
pretend otherwise. License note: the card shows NOASSERTION because Chatwoot
relicensed with enterprise carve-outs — fine to self-host, but read the terms
before building a commercial product on it.
Zammad — the closest to Zendesk’s actual ticketing shape
Zammad (5.6k stars, Ruby, AGPL-3.0) is the one whose model most resembles Zendesk: email, phone, and chat folded into a real ticketing system, with SLA policies and reporting that go deeper than Chatwoot’s. If you genuinely used Zendesk’s SLA and ticket-workflow features, Zammad is the project to evaluate first. The honest gap is its knowledge base — it trails Zendesk’s Guide product in content organisation and the SEO-oriented help-center features. AGPL -3.0, which does not trigger for running your own support desk.
FreeScout — the lightweight shared-mailbox pick
FreeScout (4.3k stars, PHP, AGPL-3.0) is deliberately small: a self-hosted shared mailbox / help desk in the Help Scout mould. If your “Zendesk” was really a handful of agents working a support@ inbox together, FreeScout is a lean, cheap-to-run answer that won’t drown you in features you never used. Actively maintained (pushed 2026-05-21), AGPL-3.0. Do not expect routing rules or analytics depth — that is not what it is for, and that is the point.
UVdesk — note the niche and the staleness
UVdesk (18.4k stars, OSL-3.0) shows the second-highest star count here, but two things temper that: it is specifically oriented toward e-commerce support (with WooCommerce/Shopify integration as a focus) rather than general-purpose enterprise support, and its last commit on the card is 2025-10-01, noticeably less active than Chatwoot, Zammad, or FreeScout. If you run an e-commerce store it may be worth a look for that specialisation; for general support I would weight the more actively maintained options. (Its unusual OSL-3.0 license is also worth a read if you plan to modify it.)
The honest recommendation
If you were under-using Zendesk: pick by support shape — Chatwoot for chat-first, Zammad for ticket-and-SLA, FreeScout for a shared mailbox. If you were genuinely using Zendesk’s enterprise routing, SLA, and analytics together, be realistic that you may be giving up capability by leaving, and weigh the savings against that — none of these is a no-compromise swap at the top end.
Comparison notes
Chatwoot self-hosted covers live chat and omnichannel messaging well but lacks Zendesk's ticket routing rules, macro automation, and SLA management depth — it targets growing teams rather than enterprise support operations. Zammad provides email, telephone, and chat ticket management closer to Zendesk's feature set with SLA policies and reporting, but its knowledge base tooling trails Zendesk's Guide product in content organization and SEO features. UVdesk is PHP-based with a WooCommerce and Shopify integration focus, suiting e-commerce support specifically but lacking Zendesk's general-purpose enterprise support breadth.
Migration tips
- Export Zendesk tickets and contacts via the Zendesk API using bulk export endpoints — Zendesk Enterprise plan provides easier export access, while lower tiers require paginating the API.
- Import exported data into Zammad using its CSV importer or Zendesk-format importer, then recreate trigger conditions and macros manually as Zammad triggers — logic is similar but the configuration UI differs significantly.
- Bulk-import agent accounts via CSV in both Chatwoot and Zammad before migrating customers to ensure support teams are operational before directing traffic.
Which alternative should you pick?
We don't believe in a single "best" answer here — the right project depends on your license constraints, team size, and tolerance for early-stage tooling. The 4 projects above each have a distinct profile. Use this decision tree:
- You want the most active community and the lowest risk of abandonment → chatwoot. 32,996★ — the largest user base in this list, which usually means more StackOverflow answers, more plugins, and more deployment runbooks online.
- You want a strong-copyleft project that resists vendor capture → zammad. AGPL-3.0 licensed — downstream forks must stay open, which is what some teams explicitly want.
License & commercial-use notes
For an open-source replacement the license often matters more than any single feature — it decides whether you can modify the project, embed it in a product, or offer it as a hosted service. Here is how the 4 projects on this page break down:
- Network copyleft (zammad, freescout) — AGPL / SSPL — the copyleft trigger extends to offering the software over a network, so a hosted deployment of a modified version can oblige you to publish your changes. Read the exact terms before building a paid hosted product on these.
- Unverified license (chatwoot, community-skeleton) — GitHub returned no clear SPDX id. Treat as all-rights-reserved until you read the project's LICENSE file directly — do not assume commercial use is permitted.
License fields come from the GitHub API's SPDX classification and can lag a relicense. The repository linked on each card is authoritative — confirm its LICENSE file before any license-sensitive deployment.
Maintenance health of these 4 projects
Of the 4 projects listed, 4 shipped at least one commit in the last 12 months. See how we rank for the full criteria and our self-hosting cost reality check, which apply across every comparison on this site.
Frequently asked questions
How do these 4 alternatives compare on maintenance health?
4 of 4 have shipped a commit in the last 12 months. At least one project here has 5,000+ GitHub stars, which usually correlates with sustained maintainership. Always check the last-pushed date in the cards above and read the latest 5 closed issues — those two signals together catch 80% of abandoned-project cases.
How this page was compiled
- Repository facts (stars, license, language, last commit) come straight from the GitHub public API and are linked on each card as the primary source.
- Editorial analysis is drafted from Zendesk's use case and the alternatives' repository metadata, then reviewed by hand.
- Maintenance signal: 4 of 4 projects shipped a commit in the last 12 months as of the latest rebuild (most recent activity: ).
- Last editorial review: by Yusuke Morinaga.
- Spotted an error? Email [email protected] with the page URL (subject prefix
[correction]) — we ship corrections within 14 days.