# Line 21 vs StreamText

StreamText and Line 21 both give human captioners a way to deliver live text to an audience, and both now add AI captions. StreamText focuses on caption delivery with per-minute pricing; Line 21 adds a choice of AI engines, live proofreading, translation, dubbing and streaming in one platform.

## At a glance

|  | Line 21 | StreamText |
| --- | --- | --- |
| Live AI captions | Yes, in 100+ languages | Yes |
| Human (CART) captioners | Yes: accredited stenographers and respeakers, or your own captioners, free | Yes: a delivery platform for CART captioners |
| Speech recognition engines | Choose per language: Speechmatics, Deepgram, Gladia, AWS Transcribe, Microsoft | Not stated publicly |
| Correcting AI captions | AI Proofreader checks every line against your event's names and terms | Not stated publicly |
| Live translation | Yes, 90+ languages with DeepL, Google, Azure and OpenAI | Yes |
| Live AI dubbing | Yes (beta): 75 languages with Gemini Live Translate | Not stated publicly |
| Captions encoded into streams | Yes: CEA-608 into RTMP and SRT, in the cloud | Yes: 608/708 cloud encoding, priced separately |
| Multi-language HLS player | Yes: a caption and dubbed audio track per language | Not stated publicly |
| Zoom and Teams | Yes: caption token for Zoom and Teams, plus a Zoom app | Yes: Zoom, Webex and Adobe Connect |
| Pricing | Free pay as you go; plans from $199 a month | Per minute, no subscription |

## Key differences

**Free for captioners**: Line 21 is free for individual captioners and the agencies that book them; StreamText charges per minute of use.

**AI that knows your event**: Line 21 chooses from several speech engines and checks every line with the AI Proofreader against your event's names and terms.

**Translation and dubbing**: Line 21 translates captions live into 90+ languages and can dub speech into 75 languages.

**Streams and players**: Line 21 includes CEA-608 encoding and a multi-language HLS player, alongside the captions page and overlay.

## Choose Line 21 if

- You are a captioner looking for a free platform
- You want AI captions that know your event's vocabulary
- You need translation, dubbing or video streaming in the same place

## Choose StreamText if

- Your clients already expect StreamText links
- You need Webex or Adobe Connect integrations

## About StreamText

StreamText has been used by CART captioners and court reporting firms since 2003 to deliver human-written captions. It offers an embeddable caption player, integrations with Zoom, Webex and Adobe Connect, translation, AI captioning, and a separately priced 608/708 cloud encoding service, all paid per minute.

Sources:

- [StreamText features and pricing](https://streamtext.net/features-and-pricing/)
- [StreamText human captions](https://streamtext.net/human-captions/)
- [StreamText 608/708 cloud encoding](https://streamtext.net/cloud-encoding-service/)

Based on StreamText's public information, reviewed October 2026.

Talk to us: [contact page](https://line-21.com/contact) or hello@line-21.com.