RSI Software Comparison 2026: All-in-One Platforms, Interpretation Layers and Built-In Add-Ons

Remote simultaneous interpretation (RSI) software comes in three types: all-in-one platforms that combine the video meeting and interpretation, such as SmartMeet; interpretation layers that add language channels to an event you run elsewhere, such as KUDO and Interprefy; and built-in add-ons inside general video tools, such as Zoom's language interpretation. The best choice depends less on brand than on which type fits your event.

Our earlier pieces explain how to compare RSI platforms feature by feature and compare SmartMeet, Zoom, Webex and KUDO. This comparison steps back and looks at the architecture behind each option, because that decides most of the trade-offs.

The three types at a glance

All-in-one platforms

An all-in-one platform treats interpretation as part of the meeting. Attendees open one link, see the video and pick their language from the same screen. Interpreters work in booths inside the same room, so they see exactly what the audience sees.

SmartMeet is in this group. Attendees and guests join in the browser and choose a language channel, with control over how loud the original plays underneath. Each language has a virtual interpreter booth with glossary search, AI term suggestions, booth chat and handover requests, and booths can take relay from another booth. Polls, Q&A, breakout rooms and recording are in the same room.

• Strengths: one link, one interface, fewer moving parts on the day, guests and interpreters inside the same room.
• Trade-off: you run the event on that platform, so it suits events you host rather than ones a venue or partner hosts on their own system.

Interpretation layers

An interpretation layer is a specialist RSI service that sits beside your main event platform. The meeting may run on Zoom, Microsoft Teams, a webcast tool or a physical venue, while interpreters and listeners use the RSI service for the language audio.

KUDO offers its own meeting environment as well as integrations with mainstream meeting platforms, and also offers access to professional interpreters. Interprefy focuses on delivering interpretation into existing platforms and on-site events, including a mobile app that attendees in a venue can use to listen. Both also market AI speech translation alongside human interpretation.

• Strengths: works with the platform an organization is already locked into, strong fit for hybrid and on-site conferences.
• Trade-off: two systems to set up and support, and attendees may need to switch between the video and the language audio.

Built-in add-ons in general video tools

Zoom includes language interpretation on selected paid plans: the host assigns interpreters, and participants choose a language channel and can lower the original audio. It is convenient for teams that already meet in Zoom.

• Strengths: no new tool for internal staff, quick to switch on.
• Trade-off: interpretation is one feature among many, so interpreter tools such as booth chat, glossary access and structured handover are thinner than in specialist platforms.

Other specialist providers, such as VoiceBoxer, also sell RSI for webinars and conferences. Feature sets and plans change often, so check each vendor's current documentation before you decide.

Six questions that decide the right type

1. Who hosts the event? If you do, an all-in-one platform is simplest. If a partner or venue does, you may need a layer.
2. How many languages and booths? Count channels, and check whether relay is needed for rare pairs.
3. Who are the attendees? External guests need browser joining without accounts or downloads.
4. What do interpreters need? Ask your interpreters. Booth chat, handover and terminology access matter to them.
5. Is it online, on-site or hybrid? On-site listeners need a phone or venue audio option.
6. What else happens in the meeting? Polls, Q&A, breakout rooms and recording should work for every language group.

Professional bodies such as AIIC, the International Association of Conference Interpreters, publish guidance on working conditions for remote interpretation. It is worth sharing with any vendor you evaluate.

Run a short proof of concept

Before you commit, run one real meeting of 30 to 60 minutes with your own interpreters, two language channels and a few external guests. Ask the interpreters and the guests for feedback. Most problems show up in the first rehearsal, not in a demo.

Conclusion

A useful RSI software comparison starts with type, not brand. Choose an all-in-one platform when you host the event and want one link for everyone, an interpretation layer when the event must stay on someone else's platform, and a built-in add-on for simple internal meetings. Then test with your own interpreters before the event that matters.

• RSI Platforms
• RSI Software Comparison
• Multilingual Software
• Event Technology
• Simultaneous Interpretation