stack recommender

Turn architecture preferences into a shortlist you can challenge.

This is a transparent rules engine, not an AI verdict. Change 7 practical constraints and inspect why each managed, hybrid, or self-hosted stack moved up or down.

Ownership modelPrimary channelLaunch preferenceStrongest team skillMonthly connected minutesRequire source accessPenalize closed managed runtimes.Require deployment-region controlFavor stacks you can place in your chosen region.

scoringOwnership 5, channel 4, launch 3, team 2, open source 5, region control 4, and volume fit up to 2 points.

Price a shortlist

ranked starting points

Top 3 by visible fit score

Not a vendor endorsement

0115 points

Retell AI

Managed phone-agent platform with testing and call operations.

why it scored

managed ownership match
phone channel support
days launch preference
app team fit
low-volume launch fit

Watch: The runtime and control plane stay provider-managed.

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0215 points

Vapi

Managed API-first platform with broad model and carrier choices.

why it scored

managed ownership match
phone channel support
days launch preference
app team fit
low-volume launch fit

Watch: Platform, model, and carrier charges remain separate.

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0310 points

LiveKit Agents

Realtime agents built around WebRTC rooms, participants, and model plugins.

why it scored

hybrid deployment flexibility
phone channel support
app team fit

Watch: Telephony and agent hosting choices still need architecture work.

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included choices

7 distinct ways to own the call path

The shortlist covers managed APIs, open hybrid runtimes, browser and multimodal infrastructure, India-friendly open orchestration, and a self-hosted Asterisk telephony edge.

Vapi Retell AI Pipecat LiveKit Agents TEN Framework Bolna Asterisk + Pipecat