AUTONOMOUS CALLS

Cold calls that improve themselves.

Boltun designs the pitch, dials the list, and rewrites its own script from every conversation. Real voices, real-time, fully autonomous.

Start calling Watch a live call →
LIVE |+1 484 555 0107
00:58
AGENT

Hi Maria — this is Ava from Northwind. I saw your team just doubled headcount. Quick one: how are you handling onboarding

LATENCY
STT120ms
LLM108ms
TTS190ms
E2E520ms
VOICE
Cartesia · Katie

TRUSTED BY OUTBOUND TEAMS AT

NorthwindCadenceVellumHalcyonRidgeline
MEET ROBERT

He remembers you. Like a person would.

Robert keeps a human-like long-term memory for every user — your product, your buyers, the objections that keep coming up, the phrasing you rejected last month. You never brief him twice.

On top of that he's read the field: we imported the canonical sales books and in-field expertise, so his drafts start from proven practice, not guesswork.

LONG-TERM MEMORY

Recalls your ICP, offer and past campaigns across sessions

Learns your voice — the words you use and the ones you ban

Carries objection patterns forward into every new script

IMPORTED KNOWLEDGE
Cold-calling classics Negotiation literature Objection playbooks Vertical field notes Compliance basics

Bring your own too — drop in decks, docs or recordings and Robert folds them into his memory.

An entire calling team, in software.

Design, dial and analyze — then let Boltun tune itself while you sleep.

01

Robert, your prompt designer

Chat with Robert to shape your agent's pitch. He remembers you between sessions — every campaign, every correction — and auto-extracts a working script from the conversation.

02

Four voice engines

Gemini, OpenAI Realtime 2.1, Grok, or the Cartesia Sonic 3.5 cascade — native speech-to-speech with sub-second latency and dozens of voices.

03

Auto-refinement

After every N calls Boltun pauses, reads the transcripts, and rewrites its own script to close more.

04

Human-in-the-loop

Keep control. Require approval before any script change goes live, with a full diff preview.

05

Timezone-aware dialer

Concurrent calling that respects each contact's window across 448 timezones, with automatic retries.

06

Live transcripts

Watch every call stream in real time with STT, LLM and TTS latency metrics, plus recordings.

01

Design

Describe your offer. Robert drafts the pitch, objection handling and goodbye.

02

Dial

Import contacts and hit start. Boltun calls concurrently, on schedule, at scale.

03

Refine

It reviews transcripts, proposes a better script, and — on your OK — keeps going.

See how it works →

Put your best rep on every line.

Spin up your first campaign in minutes. No headset required.

Start calling