Guide · Updated September 2026
Best Stremio subtitle addons in 2026
Seven addons that actually work, in three families: the ones that find subtitles someone uploaded, the ones that translate with an AI key you bring, and the one we make. For each: what it does well, what it lacks, and where to get it.
Disclosure: we make Auto-Subs. It is in the list with its real drawbacks, and every other entry links to its own page so you can check us.
First, decide which problem you have
Subtitles in your language usually exist, Stremio just doesn't find them? A finder from family 1 fixes that for free.
Subtitles in your language usually don't exist? A finder can't help; there is nothing to find. You need a translator from family 2 or 3, and the choice comes down to one question: do you want to run the AI yourself, or have someone run it for you?
Family 1: subtitle finders (free)
1. OpenSubtitles v3
Official · free account · API key
Good: the largest catalogue there is, 60+ languages, maintained by OpenSubtitles itself. The right first install for everyone.
Missing: it can only serve what someone uploaded, so new episodes and smaller languages often come up empty; free accounts have a daily download cap; crowd-sourced files can carry the uploader's promo lines.
2. SubDL
Community · free API key
Good: a second catalogue with different uploads, strong for anime, and the addon uses your own free SubDL key so your requests stay under your control.
Missing: a finder only, no translation; same "nothing uploaded, nothing served" limit; one more account and key to keep.
3. SubSource
Community · free · no account
Good: zero setup, community uploads in many languages, often surfaces regional options for internationally popular titles.
Missing: reliability and matching vary; again nothing is created, only found.
Family 2: AI translators with your own API key (free software, your bill)
These are open-source projects. They fetch an existing subtitle and send it to a model you pay for with your own key at OpenAI, Google, DeepL or another provider, or to a free machine-translation engine. The software costs nothing. The upkeep is where the cost is, and it is the same story for all three: you are the operator. You create the provider accounts, generate and paste keys, watch quotas and billing, and find out that a model was deprecated only when your subtitles quietly stop appearing mid-season. Nobody checks the output, either: whatever the model returns is what you watch.
4. SubMaker
Open source · hosted free by ElfHosted, or self-host · bring your own keys
Good: the most complete DIY toolkit. Six subtitle sources, 10+ AI providers (Gemini, OpenAI, Claude, DeepL, DeepSeek, Mistral, OpenRouter, local models), a shared cache, 197 languages.
Missing: you supply keys for the sources and for the model and you babysit their limits; its own README puts a first translation at 1 to 3 minutes and says sync quality depends on the workflow you pick; no quality check on the translation itself.
5. Stremio-Translate (geanpn)
Open source · Google Translate free, or your OpenAI / Gemini / DeepL key
Good: the simplest way to get something in your language at no cost, thanks to the keyless Google Translate mode; a dashboard shows token usage when you switch to a paid model.
Missing: Google Translate renders dialogue literally and flat; the AI modes need your keys and inherit every provider hiccup; no gender or consistency checks.
6. SubTranslate
Free · Gemini API key
Good: synchronized translations on top of OpenSubtitles, and the Gemini key is only used when a new translation has to be created.
Missing: a single provider, so a Gemini quota change or outage is a subtitle outage; you manage the key; no output validation.
Family 3: hosted translation, nothing to run
7. Auto-Subs
Hosted · no keys · free trial, then from $2.99/month
Good: press play and the subtitle is there in about a minute, on every device your Stremio account is signed into. Dozens of translation models compete for every batch and any model that mangles grammar or blends scripts is removed from rotation; lines are attributed to speakers so gendered languages (Arabic, Hebrew, Spanish, Portuguese, French, Polish, Russian) come out right; timing is never touched; no ads inside subtitles; 32 languages; dual-subtitle mode; and when no English subtitle exists at all, it translates from the best file in any other language and keeps checking for a week so new episodes are ready before you return. When a provider misbehaves, we swap it, not you.
Missing: it is paid after the trial (3 titles free in your first 7 days, then $2.99/month for 60 new titles or $6.49 for 200); it is Stremio-only for now; the first play of a brand-new title takes about a minute rather than being instant; and like every translator here it needs a subtitle in some language to exist somewhere. Nothing can subtitle a film that has no subtitle file anywhere yet.
Side by side
| Addon | Creates subtitles that don't exist | Setup | Who runs the AI | Checks the output | Timing | Price |
|---|---|---|---|---|---|---|
| OpenSubtitles v3 | No | Free account + key | — | — | As uploaded | Free, daily cap |
| SubDL | No | Free key | — | — | As uploaded | Free |
| SubSource | No | None | — | — | As uploaded | Free |
| SubMaker | Yes | Source keys + AI keys | You | No | Varies by workflow | Free + your API bill |
| Stremio-Translate | Yes | Optional keys | You, or free Google Translate | No | Preserved | Free + your API bill |
| SubTranslate | Yes | Gemini key | You | No | Preserved | Free + your API bill |
| Auto-Subs | Yes, even without an English source | Install + pick a language | Included | Yes, tested rotation + speaker attribution | Untouched | Free trial · $2.99/mo · $6.49/mo |
Details taken from each project's own page on 9 September 2026 and may change. "Checks the output" means the addon validates the translated text before serving it.
Our honest recommendation
- Install OpenSubtitles v3 first. Free, official, and it solves the "not found" problem for most people. Add SubDL if you watch anime or non-US content.
- If you keep hitting "no subtitles in your language", you need a translator. SubMaker or Stremio-Translate if you are comfortable holding API keys and fixing things when a provider changes; Auto-Subs if you would rather it just worked, on every device, with output that someone actually checked.
Try Auto-Subs on your next episode. Three titles free in your first week, no card, works on every device signed into your Stremio account.
Install Auto-SubsTwo minutes to set up. See how it works · Plans
Frequently asked
What is the best Stremio subtitle addon in 2026?
It depends on what is missing. If subtitles in your language usually exist, OpenSubtitles v3 plus SubDL cover most titles for free. If they usually don't, you need a translation addon: SubMaker or Stremio-Translate if you are willing to run your own AI API keys, or Auto-Subs if you want it to work out of the box with tested translation quality and no keys (paid after a free trial).
Do Stremio subtitle addons work on Android TV, LG and Samsung TVs?
Any addon that runs on a server works on every device your Stremio account is signed into, including TVs. OpenSubtitles v3, SubDL, SubSource, the hosted SubMaker instance and Auto-Subs are all server-side.
Why do bring-your-own-key AI subtitle translators keep breaking?
They depend on your own API key at OpenAI, Gemini, DeepL or another provider. When that provider changes rate limits, deprecates the model you configured, or your quota runs out mid-episode, subtitles silently stop until you notice and fix the setup. That upkeep is the real cost of a free translator.
Do translated subtitles stay in sync with the video?
Only when the addon translates the text and leaves every cue's timestamps untouched. Some translation workflows re-segment the text and can drift; Auto-Subs and SubTranslate keep the original timing.