OptiConvo

Core features

Control language, personality, and context

Customise every session before it starts. These are the building blocks of every OptiConvo practice session.

Any language
30+ languages
Switch the conversation language per session. Practice interviews, medical visits, or small talk in the language you are actively learning, with a persona that responds naturally in that language.
Personality sliders
5 dimensions
Adjust mood, sassiness, formality, empathy, and hostility with five live sliders. Add free-text context or upload a PDF, DOCX, or TXT so the persona understands your exact project or situation.
AI persona builder
Describe → generate
Describe a character in plain English. Gemini generates the name, role, and system prompt, and a Beyond Presence avatar agent is spun up automatically for a live avatar session.
Custom chat personas
Save & reuse
Build a text-and-voice persona from sliders and a description when none of the defaults fit. Saved to your account and ready for any future session.

Built-in capabilities

These are the underlying capabilities that run inside every session: voice, lip sync, memory, and intelligence.

Real-time voice & lip sync
WebRTC · ElevenLabs
ElevenLabs TTS streams sentence-by-sentence for near-zero latency. The Beyond Presence avatar lip-syncs over a live WebRTC connection. Photorealistic, not a pre-rendered clip.
Session history
Persistent
Every conversation is saved and linked to your account. Revisit past sessions to see how your confidence and responses evolve across multiple practice runs.
Unscripted AI responses
Gemini 2.5 Flash
Every reply is generated fresh by Gemini 2.5 Flash. No two sessions are identical, so you build genuine adaptability rather than memorised answers.
Context upload
PDF · DOCX · TXT
Drop in a PDF, DOCX, or plain text file before a session. The persona reads it and uses it throughout the conversation. Useful for pitch decks, case files, or study notes.

Why OptiConvo

No scripted responses
Every reply is generated fresh. No two sessions are the same, which means you can never simply memorise your way through.
Repeat any scenario
Run the same persona ten times in a row. Each attempt starts clean, letting you measure incremental improvement across identical conditions.
Runs in the browser
No app install, no plugins, no configuration. Open the URL, sign in, and start your session immediately on any device.

Start today, it's free

Create an account, pick a persona, and practice in the browser. No install required. Just open and go.