Tandem connects 35M+ language learners worldwide with real-time voice and video powered by Agora

Education / Language Learning

Problem

Delivering seamless, real-time conversations across 180+ countries, while scaling to millions of users and thousands of concurrent participants - without compromising audio clarity, latency, or platform stability.

Solution

Agora’s ultra-low latency Voice and Video SDKs provide the real-time infrastructure powering Tandem’s 1:1 audio/video calls and large-scale Language Parties.

Results

35M+ users supported across 180 countries

1.7x higher engagement for Language Party participants

50M+ live visits powered in 2025 alone

About Tandem

Connecting cultures through real conversations

Founded in 2015, Tandem is a global language exchange platform built on a simple idea: the best way to learn a language is by speaking it with real people. Originally launched as a broader cultural exchange platform, Tandem quickly recognized language exchange as its most meaningful and high-demand use case, evolving into one of the world’s largest real-time language communities.

Today, Tandem connects more than 35 million members across 180+ countries and supports 300 languages - including sign, indigenous, and constructed languages - making it one of the most diverse language communities globally. Unlike structured coursework platforms, Tandem enables authentic, real-world conversations through 1:1 text, audio, and video calls, in-app correction and translation tools, and live audio rooms called Language Parties - where real-time communication is the foundation of the experience.

The Problem

An RTC provider that can support global delivery at scale

As Tandem’s global community expanded to 35M+ members across 180+ countries, delivering consistent, high-quality real-time communication became increasingly important to maintain the quality of experience.

Tandem depends entirely on live human interaction. Whether through 1:1 audio/video calls or large-scale Language Parties, users expect conversations to feel natural, immersive, and seamless, regardless of geography, device, or network conditions. Even minor latency, audio distortion, or instability could erode trust and engagement. At the same time, Tandem needed infrastructure capable of supporting rapid user growth, high concurrency events, and evolving product innovation.

Difficulty maintaining consistent, high-quality communication across 180+ countries

Scaling high-concurrency audio rooms without performance degradation

Securing dependable infrastructure to handle rapid user growth

The Solution

An ultra-low latency real-time engagement provider with global infrastructure

To support Tandem’s growing real-time communication needs, the team required a unified infrastructure to power both 1:1 conversations and large-scale audio rooms. Tandem selected Agora to provide a reliable, production-ready foundation for seamless voice and video experiences.

In 2021, Tandem consolidated its real-time stack with Agora, transitioning peer-to-peer calls and Language Parties to Agora’s Voice and Video SDKs. This simplified operations, improved reliability, and enabled high-concurrency conversations without compromising audio quality or latency. Agora’s global network ensures stable interactions across devices and regions. With this foundation, Tandem can support continued growth, power digital integration language programs in partnership with the German government, and expand into AI-driven conversational experiences.

Agora Products

Why Tandem chose Agora:

Ultra-low latency voice and video for natural, uninterrupted conversations globally

Scalable architecture supporting 1M+ Language Parties and 50M+ visits

Dynamic audience scaling with 17 speakers and thousands of listeners

Enterprise-grade reliability and global coverage for long-duration sessions

-

The Power of Real-Time Engagement

Products Used

“With over 35 million members across nearly every country, delivering stable, high-quality real-time communication is fundamental to Tandem. Agora gives us the reliability and scalability we need to power everything from 1:1 conversations to large Language Parties, allowing us to focus on building community rather than managing infrastructure.” 

Tobias Dickmeis, Co-Founder and CPO at Tandem

Results and ROI

Increased engagement, scalability, and platform reliability

After consolidating Tandem’s real-time communication infrastructure with Agora, the platform improved the stability and performance of both 1:1 conversations and large-scale Language Parties. With ultra-low latency voice and video across 180+ countries, it now supports millions of users simultaneously without quality degradation.

Agora’s global network enables Tandem to scale high-concurrency events and support long-duration sessions. One Language Party even ran for 47 hours straight. This foundation also enables expansion into new use cases, including public-sector digital education initiatives. Real-time performance has become a competitive differentiator, driving stronger engagement, retention, and continued innovation in AI-driven conversational experiences and global growth.

Results after implementing Agora:

50M+ live visits and 1M+ Language Parties supported in 2025

180+ countries reached with stable, ultra-low latency voice and video

1.7x increase in long-term engagement for Language Party participants

47-hour continuous sessions successfully hosted without platform failure

“Real-time communication is at the heart of Tandem. With users in almost every country and a community of over 35 million members, we need infrastructure we can trust. Agora empowers us to scale globally today and build the next generation of conversational experiences for tomorrow.” 

Tobias Dickmeis, Co-Founder and CPO at Tandem

Get started with
10,000 free minutes

Sign up and start building! You don’t pay until you scale.
Try for Free

私たちに話してください

Agoraのテクノロジー、開発、価格設定、パートナーシップについてご質問がある場合でも、私たちがお手伝いします。
セールスに問い合わせる

デベロッパーリソース

Agora SDK を使ってビルドを始めましょう。ガイド、サンプルアプリ、SDK ダウンロード、ドキュメント、API リファレンス、FAQ などにアクセスできます。
ドキュメントに移動
連絡
+1 408 879 5885
2804 ミッション・カレッジ・ブルバード
米国カリフォルニア州サンタクララ95054
なぜアゴラなのか
アゴラアドバンテージ製品ソリューションパートナー成功事例
会社
私たちについてブログコンプライアンスとプライバシーマネジメント[イベント]採用情報ニュースルーム投資家向け広報
始めましょう
ログイン価格設定サポートプラン始めようドキュメンテーション私たちに話してください
プライバシーポリシークッキーポリシーサービス規約許容される使用ポリシーサイトマップ利用規約の乱用を報告マイクッキーの管理
著作権 © 2025 アゴラ | 無断転載を禁じます。