Newsletter platforms
Best open source alternatives to GetResponse 4 open-source tools, licences checked on GitHub
- Open-source tools
- 4
- Licences
- 3
- Most GitHub stars
- 2,372
- Self-host stated
- 2
Data checked Oct 14, 2026 against the vendors' own pages. How we verify
We found 4 open-source tools that share a category with GetResponse. Each licence is GitHub's own value for the repository, and each tool's website says the product is open source.
Licences: AGPL-3.0 (2), Apache-2.0 (1) and GPL-2.0 (1). GPL-family licences require you to publish the source of modified versions you distribute (AGPL also when you run them as a network service); permissive licences such as MIT and Apache-2.0 do not.
learnhouse has the most GitHub stars here (2,372, checked Oct 14, 2026). Stars measure attention on GitHub, not quality.
1 of them is ranked on the newsletter platforms scorecard. Order: tools in GetResponse's own market come first, then the rest, ranked tools by rank, then by GitHub stars.
2 tools state a self-hosting option on their own site; for the others we found no statement either way.
Open source GetResponse alternatives compared
| # | Tool | Licence | GitHub stars | Repository | Self-host | Paid from, monthly | Free plan | Score | Data checked |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  warmbly | Apache-2.0 | 431 | warmbly/warmbly | Yes | Not offered | Yes | 78/100 | Oct 14, 2026 |
| 2 |  learnhouse | AGPL-3.0 | 2,372 | learnhouse/learnhouse | Yes | Contact sales | No | Not ranked | Oct 14, 2026 |
| 3 |  classroomio | AGPL-3.0 | 1,717 | classroomio/classroomio | – | $35/mo | Yes, 20 members | Not ranked | Oct 14, 2026 |
| 4 |  sensei | GPL-2.0 | 596 | Automattic/sensei | – | Not offered | Yes | Not ranked | Oct 14, 2026 |
Each value links the page it was read from (hover for the check date).
– = not published by the vendor, or not verified yet.
How each one differs from GetResponse
- warmbly · Apache-2.0
Open-source cold email platform that warms up mailboxes, sends campaign sequences and gathers replies in one inbox, with a built-in CRM.
- Licence: Apache-2.0 (GitHub, checked Oct 14, 2026) source
- GitHub stars: 431 (checked Oct 14, 2026) source
- Vendor says: "Star on GitHub· 430 Join the Discord Log in Start free Open source Self-host the whole platform · Apache 2.0 Apache 2.0 The largest open-source" source
- Self-host: stated on the vendor's site source
- Hosted or paid plan: $23 per month billed annually (Starter), $7.42 more than GetResponse's $15.58 source
- Score: 78/100, #14 of 27
- Verified features: Automations / sequences, A/B testing, Open and click analytics, Public API
5 of 14 tracked details verified
Homepage captured Oct 14, 2026 - learnhouse · AGPL-3.0
Open-source learning platform for creating and selling courses, with communities, podcasts, analytics, payments and an AI assistant.
- Licence: AGPL-3.0 (GitHub, checked Oct 14, 2026) source
- GitHub stars: 2,372 (checked Oct 14, 2026) source
- Vendor says: "Cookie Policy Company Blog Contact Found a bug or issue? Open Source AGPLv3 licensed, self-hostable GDPR Ready EU data protection compliant G2" source
- Self-host: stated on the vendor's site source
- Hosted or paid plan: contact sales (no published price) source
- Verified features: Open and click analytics, Public API
4 of 14 tracked details verified
- classroomio · AGPL-3.0
Open-source learning management system for running customer, employee and partner training academies with AI authoring, certificates and custom domains.
- Licence: AGPL-3.0 (GitHub, checked Oct 14, 2026) source
- GitHub stars: 1,717 (checked Oct 14, 2026) source
- Vendor says: "academy on your domain in a few days. Book a Demo The Open Source LMS for compliance training and certification programs. Product MCP Recipes API" source
- Hosted or paid plan: $35 billed monthly (Early Adopters), $16 more than GetResponse's $19 source
- Verified features: Public API
2 of 14 tracked details verified
- sensei · GPL-2.0
WordPress plugin for creating and selling online courses with quizzes, certificates, interactive lessons and cohort management.
- Licence: GPL-2.0 (GitHub, checked Oct 14, 2026) source
- GitHub stars: 596 (checked Oct 14, 2026) source
- Vendor says: "portability — export and import content wherever It is all open source, so customize and make it your own Easy course creation with the familiar" source
- Hosted or paid plan: $5 per month billed annually (Interactive Blocks), $10.58 less than GetResponse's $15.58 source
- Verified features: Open and click analytics
3 of 14 tracked details verified
How we picked
- Open source only: the licence is GitHub's SPDX value for the tool's repository (NOASSERTION or no licence is left out), and the tool's own website or our grounded summary says the product is open source. A company that merely publishes a repository is not counted.
- Same category or overlapping use: the tool lists at least one category the tool on this page lists; tools in its own market come first.
- Order: tools ranked on the category scorecard by rank (at least 60% of the weight with verified data), then by GitHub stars, then name. Stars are as of the date shown.
- Self-hosting is shown only when the vendor's site states it. A feature counts as missing only when the vendor's page states it; a feature the vendor does not mention is not listed either way.
- This page is built only when at least 3 tools qualify.
Every value is read from the vendor's own pages (or GitHub for licences and stars) and shown with the date we checked it. A value we could not verify is shown as a dash, never estimated, and never read as a “no”. We did not test these tools hands-on unless a listing says so. Methodology
The scorecard behind the ranks
Every one of these newsletter platforms is scored by the same 8 criteria (scorecard v2). Each criterion gives 0 to 100 from the vendor's published data; the total is the weighted average. A criterion without verified data is left out and the other weights are re-normalised. A tool with under 60% of the weight covered is listed as not ranked, and so is a tool with no verified price and fewer than 2 verified features (“needs a verified price”); each score shows how many criteria it is based on. The core criteria are the same in every category; the category criteria are specific to newsletter platforms. Nobody gets custom weights, including our own products.
| Criterion | Weight | Type | What we measure |
|---|---|---|---|
| Entry price | 25% | Core | Price per month of the cheapest paid plan, against the prices of other newsletter platforms on the same billing basis (monthly-billed prices against monthly, annual-billed against annual).Log scale. Billed monthly: $9/month or less = 100, $100 or more = 0. Only billed annually: $9/month or less = 100, $159 or more = 0. Only free plans = 100. Usage-priced and one-time plans are not scored. |
| Free plan or trial | 15% | Core | Whether you can use the tool before paying: a free plan, or failing that a free trial, as shown on the vendor's pricing page.Free plan = 100. No free plan but a free trial = 60. The pricing page lists plans but shows neither = 0. No plans read = not scored. |
| Pricing transparency | 10% | Core | How much of the pricing is public: the share of plans with a published price ("contact sales" counts against), and whether there are at least 3 published tiers.80 x (plans with a public price / plans listed) + 20 x (public plans, up to 3) / 3. No plans read = not scored. |
| Verified features | 15% | Core | How many of the 9 features we track for this category the vendor's own pages verifiably show (paid subscriptions, automations / sequences, custom domain, referral programme, a/b testing, landing pages and forms, segmentation and tags, newsletter website, open and click analytics). This counts verified features only: a tool that documents less scores lower here, and only here.Linear: verified features / 5 (half the tracked list) x 100, capped at 100. No tracked feature verified = not scored. |
| API, integrations and export | 10% | Core | Whether a public API exists, how many integrations the vendor states, and whether the vendor documents a way to export your data.Average of the parts with data: public API yes = 100, no = 0; integrations on a log scale (100 or more = 100); a documented data export = 100. None verified = not scored. |
| Cost at 1,000 subscribers | 10% | Category | Monthly price of the cheapest paid plan that allows at least 1,000 subscribers.Log scale: $5/month or less = 100, $100 or more = 0. Plans that do not state a subscriber limit are not used. |
| Free plan limits | 10% | Category | What the free plan allows: subscribers (full marks at 2,500), emails per month (full marks at 10,000).Each stated limit linear up to its full mark (unlimited = 100), averaged. Tools without a free plan, or whose free plan states none of these limits, are not scored here. |
| Paid subscriptions | 5% | Category | Whether writers can charge for subscriptions, and the platform's fee on that revenue.No paid subscriptions (verified) = 0; paid subscriptions: linear, 0% fee = 100, 15% or more = 0. Fee not stated = not scored. |
Sources are vendor pricing pages, docs and changelogs, each with the date we checked it. We did not test these tools hands-on unless a listing says so. Full formulas: methodology.
Questions, answered from the data
Is there an open source alternative to GetResponse?
Yes: 4 open-source tools share a category with GetResponse, led by warmbly, learnhouse and classroomio.
Which open source GetResponse alternative is most popular on GitHub?
learnhouse, with 2,372 GitHub stars (checked Oct 14, 2026).
Which licences do these alternatives use?
AGPL-3.0: 2, Apache-2.0: 1 and GPL-2.0: 1, as GitHub reports them for each repository.
Which ones can I self-host?
warmbly and learnhouse state a self-hosting option on their own site.