Zypager
Pricing

Transparent “from” pricing for real engineering work

Clear starting points for diagnostics, audits, emergencies, installation and advanced voice work. Final pricing depends on scope, urgency, system complexity and access requirements.

Most requested
SIP Diagnostic Review
from£295

Focused written review of one specific issue.

  • One SIP / RTP / ASR problem
  • Call example review
  • Configuration notes
  • Written findings
  • Recommended next steps
Discuss scope
Voice Infrastructure Audit
from£750

Asterisk, FreeSWITCH, Kamailio, OpenSIPS, RTPengine or trunk review.

  • Architecture review
  • Security review
  • Routing review
  • SIP / RTP risk review
  • Written report
Discuss scope
Emergency VoIP Troubleshooting
from£125/hour

For urgent incidents.

  • SIP / RTP fault isolation
  • Carrier troubleshooting
  • Failed inbound / outbound calls
  • RTP / no-audio issues
  • Written follow-up
Discuss scope
Out-of-hours Emergency
from£175/hour

Urgent incidents outside normal hours.

  • Evening / weekend response
  • SIP / RTP fault isolation
  • Carrier troubleshooting
  • Written follow-up
Discuss scope
Monthly Voice Retainer
from£750/month

For ongoing support.

  • Written technical support
  • Periodic review
  • Incident guidance
  • Architecture improvements
  • SIP / security recommendations
Discuss scope

What pricing depends on. Final pricing depends on scope, urgency, system complexity and access requirements. Zypager does not promise guaranteed fixes — voice problems vary, and some require carrier cooperation or live access under appropriate change control. No payment is taken upfront — once scope and final price are agreed by email, you’ll get a secure payment link by card or PayPal.

Installation & deployment

done for you · per system

Fixed “from” prices to install and configure a single system on your server — or combine several into a full build. Tick the ones you need and see the running total below.

Install Asterisk (pure)

£450

Plain Asterisk from source with PJSIP — full control over dialplan and config.

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Install FreePBX

£550

Asterisk plus the FreePBX web GUI.

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Install Issabel

£550

Issabel unified-communications distro on Asterisk.

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Install Kamailio

£650

Kamailio from the official repository with TLS / WebSocket modules.

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Install OpenSIPS

£650

OpenSIPS with a routing skeleton for trunking.

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Install RTPengine

£550

RTPengine with the in-kernel module for low-latency media.

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Kamailio + RTPengine

£950

Wired together so media is relayed and one-way audio disappears.

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OpenSIPS + RTPengine

£950

OpenSIPS wired to RTPengine for reliable two-way audio.

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Asterisk + Kamailio + RTPengine

£1,250

The full stack — edge, media and application — integrated and documented.

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Kamailio High Availability

£2,000

Floating edge IP, dispatcher failover and shared state across two nodes.

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OpenSIPS High Availability

£2,000

Highly available OpenSIPS edge with failover and shared state.

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VoIP Edge Hardening

£750

Firewall, rate limiting, TLS/SRTP and route restrictions.

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Asterisk ARI development in Go

ARI · Go
ARI review
Asterisk ARI Review
from£450

Written review of an existing or planned ARI application.

  • Call-control / state model review
  • Event handling & recovery review
  • Reliability & testing notes
  • Recommended next steps
Discuss scope
Most requested
Basic ARI Go Application
from£950

A baseline event-driven ARI application in Go.

  • Go ARI application skeleton
  • Connection & event handling
  • Basic call-control flow
  • Logging & error handling
  • Run / test notes
Discuss scope
ARI workflow
ARI IVR / Recording / Bridge Workflow
from£1,500

A specific ARI workflow designed and implemented.

  • IVR / recording / bridge flow
  • State & error handling
  • Recording or playback handling
  • Testing & deployment notes
Discuss scope
ARI integration
Contact Centre ARI Integration
from£2,500

ARI integration for contact-centre call control.

  • Agent / queue call-control flow
  • Transfers & supervised handling
  • Integration with backend services
  • Reliability, logging & recovery
  • Written implementation notes
Discuss scope

Advanced voice applications & ASR

Vosk · offline ASR
Most requested
Vosk ASR Review
from£450

Written review of whether Vosk suits a specific recording, transcription or voicebot workflow.

  • Use-case & audio-quality review
  • Codec / sample-rate considerations
  • Language & model considerations
  • Latency expectations
  • Batch vs near-real-time options
  • Recommended next steps
Discuss scope
Offline ASR
Vosk Server Installation
from£650

Baseline installation of a Vosk server for local speech-to-text.

  • Vosk server deployment
  • Model installation guidance
  • WebSocket / gRPC endpoint notes
  • Basic audio test
  • Resource sizing notes
  • Build / run documentation
Discuss scope

Model choice, GPU/CPU sizing, scaling, custom vocabulary and Asterisk integration are quoted separately.

Asterisk ASR
Asterisk + Vosk Integration
from£950

Integration for Asterisk recordings or ARI workflows using Vosk.

  • Asterisk recording flow review
  • ARI integration approach
  • Audio format conversion approach
  • Transcription storage design
  • Written implementation notes
Discuss scope

Live streaming, voicebot behaviour, diarisation and production deployment are quoted separately.

Transcription pipeline
Call Recording Transcription Pipeline
from£1,500

Pipeline design for converting recordings into searchable transcripts.

  • Recording ingestion
  • Job queue design
  • Audio conversion
  • ASR processing flow
  • Transcript storage
  • Privacy / redaction considerations
Discuss scope
Real-time ASR
Real-Time ASR / Voicebot ASR PipelineQuoted per project

Architecture for near-real-time ASR used by voice agents or live assist.

  • Indicative projects often start from £3,000+
  • Streaming ASR design
  • Latency considerations
  • Asterisk ARI integration approach
  • ASR / LLM / TTS flow
  • Fallback & human handoff
Discuss scope

Real-time ASR and voicebot projects depend on latency, audio quality, language, call volume and fallback requirements.

Common add-ons

Custom ASR Vocabulary / PhrasesQuoted separately

Review of domain-specific terms, names, products, queues or call-centre phrases that may affect recognition quality.

Transcript Storage and Searchfrom £750

Storing transcripts in PostgreSQL and making them searchable by interaction, recording, call ID, customer, date or agent.

AI Call Summary Pipelinefrom £950

Pipeline design for controlled summaries from call transcripts with privacy, redaction and human review considerations.

Future platform direction

Future platform discovery

Quoted separatelyDiscovery & architecture

Discovery and architecture planning for future omnichannel contact-centre workflows, campaign automation, messaging channels, dialler strategy, chatbot integration and voice platform design.

Requirements discoveryArchitecture optionsProvider / API feasibility reviewDialler strategy reviewData model considerationsVoice layer reviewIntegration risksPhased roadmap

This is not a ready-made product sale. Full platform delivery requires separate scoping, design and development.

Discuss discovery

Pricing questions

You send one specific problem with a call example and any trace or configuration you can share. You receive written findings, likely root cause and recommended next steps — a focused, fixed starting price for a single issue.

For urgent, live incidents — failed inbound/outbound calls, RTP/no-audio and carrier problems — where the priority is fault isolation and restoring service. Scope and availability depend on access and complexity.

Ongoing written technical support, periodic review, incident guidance, architecture improvements and SIP/security recommendations. It suits teams that want a senior VoIP engineer on call without a full-time hire.

No payment is taken upfront. Once we've agreed the scope and final price by email, you'll receive a secure payment link — by card or PayPal — for that amount.

Not sure which service you need?

Send the symptoms and a call example. The right starting point becomes obvious from the trace.

Contact Zypager