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Plunk (self-hosted)
github.com/useplunk/plunkTransactional sender (self hosted)email/plunk-selfhostJSONcomparereport an errorprovider JSON
- Free allowance
- No allowance stated for self-hosted instances: https://docs.useplunk.com/concepts/billing says 'Pricing on this page applies to the hosted version at useplunk.com; self-hosted instances run on their own infrastructure'
- Verdict
- self-hosted, last resortverdict qualifies-with-caveat: usable, with a named limit or an unprobed read path. Self-hosted options are listed last, because this site is for users who have no hardware.
- Cost
- not stated
- Identity
- anonymousno card, no phone
- Binding limit
- noneno named constraint binds
- Evidence
- documented5 sources; a first-party page was read and the sentence quoted
- Freshness
- stale on 2026-12-03checked 2026-11-02 (live); stale on 2026-12-03
| Free tier | no allowance stated for self-hosted instances: https://docs.useplunk.com/concepts/billing says 'Pricing on this page applies to the hosted version at useplunk.com; self-hosted instances run on their own infrastructure'unit none; metered on none; self-hosting is offered as 'Self-host for free', run on the user's own infrastructure with no per-email costs, and the software is listed as AGPL-3.0 licensed ( https://www.useplunk.com/pricing) |
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| Price | none stated |
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| Identity | anonymous the software needs no account |
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| Egress | the relay's terms, not the software's |
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| Retention | whatever the relay and the database keep |
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| Interface | rest a self-hosted Plunk instance against your own database and relay |
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| Tooling | docker compose, the Plunk API |
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| Composes with | the front half of the only chain that reaches real volume, and that chain is paid: Plunk self-host in front of SES at USD 0.10 per 1,000. |
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| Notes | The software is free and the mail is not. |
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| Evidence note | documented no probe: the application was not installed. The claim is that the software imposes no limit, which is a claim about absent code and is unmeasured |
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Evidence 5
| date | source | what it proved |
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| 2026-10-22 | docs.useplunk.com/concepts/billing | the billing concepts page separates the hosted allowance from the self-hosted deployment |
| 2026-11-02 | docs.useplunk.com/concepts/billing | the page's pricing, its free tier included, applies to the hosted version; for self-hosted instances it says only that they run on their own infrastructure, and it gives them no allowance or price |
| 2026-11-02 | www.useplunk.com/pricing | the vendor's pricing page offers self-hosting as 'Self-host for free' on the user's own infrastructure with no per-email costs, and lists the software as AGPL-3.0 licensed; it puts no price on the self-hosted offer |
| 2026-11-02 | github.com/useplunk/plunk | the repository README names the software's licence as AGPL-3.0 |
| 2026-11-02 | docs.useplunk.com/self-hosting/introduction | the self-hosting requirements list an AWS SES account for sending emails, with Docker and Docker Compose and a domain name with subdomains for each service |
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