EFFEREX
Efferex Technologies · United Kingdom · Pakistan · AI-first engineering

Everyone sells AI. Almost no one shows the bill.

Measured

Every claim arrives with its measurement.

Operated

Three systems, run in production.

We publish the measurements.

§00 Efferex Technologies · United Kingdom · Pakistan · AI-first engineering REV 2026.08

An AI-firstengineering companyin the UK & Pakistan.

Efferex Technologies Ltd is a UK-incorporated technology company operating B2B software products, including Voxif (voice and WhatsApp automation for businesses).

§01 What we run · owned, operated, instrumented SUBJECT 01 / 03 · Voxif
Cost per call · BYOK $0.064

Voxif

Enterprise AI voice platform. Places and answers calls on your carrier, your keys, your voice.

Free 30 min · Pro $49 / mo · 2,000 minutes Open voxif.tech →
01 / 03 · Beta
Payment → unlock 30min

QistBuddy

Device financing, secured. Consensual, agreement-signed locking on Android Device Owner.

For mobile-phone shopkeepers · audited, reversible Direct line →
02 / 03 · Beta
Status In development

SchoolOS

The operating system for schools: records, attendance, timetabling and fees, in one place.

No dates promised · measured before it ships Direct line →
03 / 03 · In development

Three systems. All ours. All running.

01 / 03 · owned · operated · instrumented
§02 The meter · what a Voxif call actually costs
$0.000
Median all-in cost · one completed call · BYOK
Cost stack
Provider (yours)$0.027
Deepgram STT$0.006
LLM tokens$0.003
TTS$0.018
Efferex platform fee$0.037

You bring your own keys, so the provider column is billed to you at cost. We do not mark up tokens. We charge for the work.

Reply latency · end of speech → first audio byte p50 / p95 · ms
EOU · VAD 120 / 210 STT 190 / 300 LLM · TTFT 410 / 620 TTS · TTFB 150 / 250 1380 p95 threshold 1500
≤ 800 ms good ≤ 1500 ms acceptable > 1500 ms over Thresholds as shipped in the Voxif console
§03 Engineering services · capability, not case studies 05 capabilities · all running
The same engineering

Pointed at your problem.

Web experiences
Next · React · GSAP30+ routes
Enterprise software
Node · Postgres23 routers
Real-time voice
LiveKit · Deepgramlive
Device control
Android · DPC≤30 min
Cloud & DevOps
Oracle · Caddy · CIAES-256
This document is our work

We build interfaces like this one.

Direct line →

Measured, not claimed.

How we proceed

Phase 01
Discovery · find the real problem
Phase 02
Architecture · agree the shape
Phase 03
Build · in the open, it runs
Phase 04
Verify · prove it with a number
Phase 05
Operate · run it, meter public

We start with discovery, agree the architecture, build in the open, verify against a threshold, then operate it with the meter left public.

The standing order

§05 The company · who publishes the measurements United Kingdom · Karachi, Pakistan

Divisions 03 / 03
01

Products

Software we own and ship.

Voxif · QistBuddy · SchoolOS: built, run and maintained by us; each status stated honestly in §01.
02

Engineering services

Built for clients, to the same bar.

No client logos and no testimonials appear on this site. Capability is shown; borrowed credibility is not.
03

AI & research

Applied intelligence: agents, voice, human-computer interaction.

Not a lab. Research ships into the products. Current reading: 1.28 s p95 reply latency on a completed call.
The same bar · four gates, three fronts §04
VERIFY BUILD ARCHITECTURE DISCOVERY 01 PRODUCTS 02 SERVICES 03 RESEARCH THE BAR
04 gates × 03 fronts · 12 checkpoints · no exemption for our own products
Scale, stated plainly

We are small, and we would rather say so than imply otherwise. Efferex is founder-led, registered in the United Kingdom, with its engineering run out of Karachi.

Base
United Kingdom (registered) · Karachi, Pakistan (engineering).
Structure
Founder-led. Small on purpose: the people who architect a system are the people who answer your mail.
Published
Reply latency, cost per call, and the thresholds we hold ourselves to · §02.
Not published
Headcount, founding date, client logos, testimonials. None of them predict whether a system holds at p95.
§06 Direct line · no funnel, no form-to-CRM, no gate One address

Talk to the people who will actually build it.

No funnel, no gatekeepers, no discovery call before anyone answers.

Routing · your message to a person who writes code 01 hop
Our route YOU hello@efferex.com 01 hop · one address · no queue ENGINEER Writes the code Common route · shown for contrast · not used here You Form Sales dev Qualify Discovery Sol. eng Engineer 06 HOPS
Send a message
No server · Send opens your own mail client

Or write to us directly
hello@efferex.com

Replies come from the engineers who would do the work, not a sales team, and not an assistant reading from a script. If we are the wrong people for the job, that is what the first reply will say.

No response-time figure is printed here. We have not measured one, so we will not publish one.

Address
hello@efferex.com
Routes to
Engineering
Registered office
Siu Offices, 4-6 Greatorex Street, London E1 5NF, United Kingdom
Engineering
Karachi, Pakistan
Local time
UTC+00:00 (UK) · UTC+05:00 (PK)