Practice sales calls
with AI. On the phone. Live.
Conduct realistic phone sales conversations with 12 speaking AI personas, with real-time streaming voices, barge-in interruption, and unrestricted call length. No script, no colleague, no burned lead. Just you, a genuine objection, and instant feedback.
No credit cardUnrestricted call lengthGerman data storage
Roleplay with colleagues trains
the script, not the customer.
Phone sales are won or lost in seconds. Realistic training has been close to impossible, until now.
Your colleague already knows your pitch.
In an internal roleplay your practice partner knows where the conversation is headed. Real customers never do. There is no real resistance, and without resistance, there is no learning.
Practicing on real leads costs deals.
"Learning by doing" on live calls means burned first contacts and lost closings. The first tough objection hits you live, in front of the customer, not in practice.
Text chatbots are not a conversation.
A text chatbot answers questions. Selling on the phone is something else entirely: speaking, listening, interrupting, holding the timing. You can only train that with a voice that talks back.
Dial in. Speak. Debrief.
No setup, no prep. Open the app and start talking, just like a real phone call.
Choose a persona & situation
Pick from 12 buyer types, 10 industry contexts, and 10 situations: from a skeptical decision-maker in cold outreach to a price-driven procurement lead in a negotiation. Set difficulty from cooperative to relentless, and choose your language (formal · informal · English).
Speak live: freely, without a script
The persona picks up with a real voice and responds via streaming audio in real time based on what you say. Interrupt with barge-in when an objection hits. Speak for as long as the conversation warrants. Call length is unrestricted.
Instant scoring the moment you hang up
Right after the call: a score across 5 dimensions. The AI evaluates each dimension and the overall score is deterministically aggregated (3 evaluation runs, median, disclosed score spread). Plus objective metrics (talk ratio, question rate, filler words) and specific text-based feedback for each weakness. Immediately actionable for your next call.
Four things that define a real phone call.
Voice, timing, pressure, and duration: sip.coach replicates all four, not just the text.
Real-time streaming voices
The personas speak with high-quality AI voices, streamed in chunks with no wait for a fully rendered audio file. No robotic sound, no latency gap.
- A searchable voice catalog assigns a matching voice to each persona
- Personas with real mood: they sound audibly excited, skeptical, or calm, depending on how your conversation goes
- Tone and temperament fine-tuning happens automatically server-side
- Audio arrives via chunk streaming: you hear the response as it forms
Barge-in: you can interrupt
The moment you start talking, the AI stops its audio output and listens, just like a real phone call. No rigid question-answer ping-pong.
- Address objections early instead of waiting for the customer to finish
- Train real conversational timing, not alternating monologues
- Over-talkers and silences can both be countered realistically
Unrestricted call length
No fixed time limit per session. Practice for 5 minutes before a meeting or run a full discovery conversation. After roughly 20 minutes the persona wraps up realistically.
- Quick drill or full-length call: you decide
- Persona exits realistically (e.g. "I have another meeting coming up")
- 40 sessions per day as a fair usage safeguard
Real pressure, not politeness
The personas have distinct characters, objection styles, and temperaments. They are impatient, demand proof, push on price, and you can dial up the difficulty.
- 12 buyer types from the friendly enthusiast to the dominant power player
- Adjustable difficulty: from cooperative to relentless
- 3 languages & forms of address: formal German · informal German · English
12 buyer types that talk back.
Each type has its own objections and its own temperament. Combined with 10 industry contexts and 10 situations, that creates over 1,000 realistic conversation combinations.
Your buyer type not on the list? In the Studio you can build custom personas from your own ICP, no developers needed.
The difference from an internal roleplay is the pressure. A skeptical decision-maker interrupts you, demands numbers, nearly hangs up, and you immediately feel exactly where your conversational structure breaks down. That feeling can be trained in ten minutes before an important first call.
What comes after the call.
Voice Roleplay is the starting point. These modules turn every conversation into measurable progress.
See all features: features overview · or back to the home page.
Voice Roleplay: questions & answers.
Practice your next sales call, today.
2 free training sessions. Try it for 4 weeks. No credit card. Setup in 2 minutes. GDPR-compliant with German data storage.