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Comparison · Decagon

Assistable vs Decagon

Decagon builds AI concierge agents for enterprise support orgs, delivered by an embedded implementation team over a multi-week rollout. Assistable brings voice and messaging agents, outbound campaigns and conversation review into a scoped deployment with published usage rates.

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The bottom line

Assistable

Assistable combines agent workflows, telephony, version control, outbound campaigns and conversation review in one platform. Your team defines the business case with us, then works through integration scope, pilot goals and rollout. Plans start with quarterly commitments and published usage rates.

Decagon

Decagon builds AI concierge agents for large enterprise support orgs and layers them onto the contact center you already run. The model is structurally different: every CTA is a demo request, docs.decagon.ai sits behind an access code, pricing is a custom quote per conversation or per resolution, and their own setup guide describes a roughly six-week phased rollout staffed by a forward-deployed Agent Development team. That depth of embedded service is the product.

The real comparison

Six places the platforms actually differ.

The same six questions on every comparison page. Here is how Assistable and Decagon each answer them.

01 / 06

Time to first live call

The work and review needed before an agent takes live calls.

Assistable

Deployment starts with the customer workflow and the outcome you want to improve. Assistable agrees on integration scope, pilot goals, testing and rollout with your team. Technical, security and procurement requirements shape the production timeline and responsibilities.

Decagon

Every CTA on decagon.ai is a demo request, and docs.decagon.ai requires an access code. Their own setup guide describes a roughly six-week phased rollout: discovery and sandbox, converting SOPs into AI-ready instructions, CRM and auth wiring, compliance review, then a controlled rollout to a slice of traffic. Implementation is staffed by Decagon's forward-deployed Agent Development team embedded with each customer.

Assistable delivers

Workflow and integration planning·Defined pilot goals and success criteria·Security and data requirements review·Testing and rollout plan agreed with your team

02 / 06

Infrastructure and telephony

What you assemble before production, and who runs it.

Assistable

Numbers, SIP, recordings, and call control run on the platform's own carrier-grade voice stack, so you never create a carrier account or manage SIP credentials. Bring-your-own numbers get a TLS SIP trunk provisioned automatically, with clean rollback if provisioning fails. DNC scrubbing, honeypot detection, A2P 10DLC campaign registration, and KYC review are built into the platform, and web chat, SMS, and voice share one data plane with identity resolution to a single contact record.

Decagon

Decagon deliberately layers onto the contact center you already operate: the Five9 integration supports PSTN and SIP, including a pre-built SIP trunk, and passes transcripts, customer data, and intent signals to human agents. It is a coexistence model, so you keep running the CCaaS and CRM underneath it.

Assistable delivers

US local and toll-free number search and purchase in-app, answering agent picked at purchase·TLS SIP trunk auto-provisioned per imported number, SRTP as explicit opt-in·Every inbound call recorded; transcript, sentiment, and itemized cost on one call row

03 / 06

Version control and rollback

How changes ship, and how fast you can undo one.

Assistable

Assistable ships the same change-control guarantees inside the builder, with no Git integration to operate. Edits autosave to a working draft while live traffic keeps executing the last published version; publishing writes an immutable numbered version, and an explicit deploy pointer decides which one serves traffic, never latest wins. Branches stage bigger rewrites and merge into Main without changing the flow id, so phone numbers, endpoints, and channels never re-point.

Decagon

Decagon's Agent Versioning is substantial and published: every AOP, tool, and guideline edit is tracked as a versioned commit, manageable in GitHub or the Decagon console, with staging workspaces, approval-based deployment, branch protections, audit logs, and live A/B Experiments between production versions.

Assistable delivers

Append-only version history with author on every version and a Live badge·One-click rollback: activate any prior version and traffic moves instantly·Branch merges republish without changing the flow id·Publish is a role-based permission; publish and rollback are audit-logged·Test drawer runs the draft on the production engine, showing node, model, tokens, latency, and cost per reply

04 / 06

Call routing and transfers

What happens when a caller needs a human.

Assistable

Warm transfer holds the caller on hold music, dials your team in order with up to 6 attempts and a 25-second default ring timeout per attempt, and screens every leg with answering-machine detection so voicemail never gets the call. The human hears a private briefing before bridging, static text or generated by the LLM from the live call transcript. Connected, voicemail, no-answer, and failed each route their own flow branch, and unanswered transfers can resume the AI instead of hanging up.

Decagon

Decagon publishes inbound voice with transfers to human agents accompanied by a concise summary, and Five9 escalations carry transcripts, customer data, and intent signals to the receiving agent. Mechanics beyond that, such as fallback chains or time-based routing, live in access-gated docs, so verify them in your demo.

Assistable delivers

Ordered fallback hunting: up to 6 dial attempts, 25-second default ring timeout each·Answering-machine detection screens every transfer leg·Tag rules route contacts to assistants per channel, with priority and active hours·A per-minute sweep force-resolves stale holds so no caller sits in silence

05 / 06

Outbound at scale

Dialing a list without burning it.

Assistable

The dial engine converges every minute: it starts scheduled campaigns, tops running ones up to their concurrency cap, and claim-first updates make double-dials impossible. Calling windows are timezone-aware with day-of-week selection and overnight wrap, retries for no-answer, busy, and failed honor the window, and a wallet at zero pauses the campaign with a stated reason instead of burning the list. You can A/B test assistants on live traffic with splits that must sum to 100 before start.

Decagon

Decagon's Proactive Agents run outbound Missions with batch dialing, AOP-driven redial cadences, human-versus-voicemail detection, branded caller identity, and automatic SMS fallback when calls do not connect. Mission dashboards track call volume, pickup rates, and overall performance.

Assistable delivers

Enroll by contact filter up to 25,000 contacts, hand-picked lists, or CSV upload·DND skip, blacklist check, and E.164 validation on every dial·Deficit-based A/B assignment with per-assistant answered and dialed rollups·Outcomes reconcile seconds after hangup; CSV export and on-demand AI executive summary

06 / 06

Observability and QA

How you find out something went wrong.

Assistable

Write monitor rules in plain English and an LLM judge grades every finished call and chat against them, citing the decisive moment in the transcript with confidence. When a rule fires, the AI drafts a minimal prompt fix, shows a line diff, and proves it by replaying the failing conversation 3 times through the published flow and re-judging. Confidence is the measured pass rate, never self-reported, and auto-apply stays off by default behind hard guardrails.

Decagon

Watchtower is a real, published QA stack: natural-language flagging criteria, rubric scoring with point values tracked over time, and coverage of human agents as well as AI. It sits alongside Simulations at scale, live A/B Experiments, and Duet, which auto-generates and refines AOPs from conversation analysis.

Assistable delivers

Every finished call and chat graded, not a sample·Verdicts cite the decisive transcript moment with confidence·Fixes proven by 3 replays through the published flow before you apply them·Per-rule health: fire rate, drift, silence, human-overturn rate

At a glance

Side by side

Getting live

Self-serve signup
AssistableTalk to sales for a scoped deployment
DecagonNo
Time to first live call
AssistableTimeline agreed to deployment scope
Decagon~6-week phased rollout per their setup guide
Full production rollout
AssistableTiming agreed to scope and review requirements
DecagonForward-deployed team, multi-week

Telephony

Buy numbers in-app
AssistableYes
DecagonNot published
Bring your own numbers
AssistableTLS SIP trunk auto-provisioned
DecagonPSTN and SIP via Five9
Warm transfer with ordered fallbacks
AssistableYes
DecagonTransfer with summary; mechanics not public
Compliance rails
AssistableDNC scrubbing, A2P 10DLC, KYC built in
DecagonCompliance review in week 5 of rollout

Versioning and QA

Version history and rollback
AssistableYes
DecagonYes
Staging without re-pointing channels
AssistableBranches merge, flow id unchanged
DecagonWorkspaces (production, staging, custom)
Always-on QA
AssistableLLM judge grades every call and chat
DecagonWatchtower rubric scoring
Fix verification
Assistable3 replays, measured pass rate
DecagonSimulations and Experiments

Pricing

Model
AssistableQuarterly commitment plus usage
DecagonCustom quote, per-conversation or per-resolution
Voice
Assistablepublished voice rates
DecagonNot published
Messages
Assistable$0.02 each
DecagonNot published
Published rates
AssistableYes
DecagonNo

Decagon capabilities and pricing reflect their publicly published information as of July 2026 and may change.

Why teams switch

Why teams choose Assistable.

01

A deployment built around your operation

Start with your workflows, volume and business goals. Agree on integration scope, pilot success criteria, testing and rollout with our team. Timing and support are set out in your proposal.

02

Version control for agents

Immutable numbered versions in an append-only history, an explicit deploy pointer with one-click rollback, and branches that merge without changing the flow id. Live traffic never executes an open draft.

03

Telephony that behaves like a phone system

Ordered team hunting with answering-machine detection, whisper briefings generated from the live transcript, tag rules with active hours, and DND, blacklist, and wallet gates on every outbound dial.

Under the hood

The infrastructure
most platforms rent.

We operate dedicated network, telephony, and compliance rails, and let you choose the models on top. That is what keeps conversations fast, clear, and safe at scale.

  • Edge

    Co-located edge PoPs and GPUs power low-latency voice AI globally.

  • Telephony

    A full telephony stack built in: native calling and texting without wiring a carrier.

  • Network

    Audio runs on a private global network, bypassing the public internet for call quality.

  • Compliance

    A programmatic compliance layer: DNC and honeypot detection, 10DLC and KYC, attribution reporting.

  • Models

    LLM, TTS, and STT à la carte, self-hosted or from major providers. Enterprises can bring their own keys.

  • Languages

    100+ languages and dialects, with real-time multilingual transcription and translation.

  • Coverage

    Calling and texting in 105+ countries.

Questions

Assistable vs Decagon, answered.

What is the difference between Assistable and Decagon?
Decagon builds AI concierge agents for enterprise support orgs, delivered by an embedded implementation team over a multi-week rollout. Assistable brings voice and messaging agents, outbound campaigns and conversation review into a scoped deployment with published usage rates.
Is Assistable or Decagon more cost effective?
Assistable plans start with quarterly commitments scoped to your deployment, with usage charged separately. Voice charges depend on orchestration, TTS, the language model, applicable telephony and enabled add-ons; chat starts at $0.02 per AI message. See /pricing for the current rate card and any announced changes. Decagon's published pricing model is custom quote. The rate card explains the voice base and any additional charges for the providers and options you choose.
When should I choose Decagon over Assistable?
Decagon is the right call for large enterprise support organizations that want a vendor-embedded team to own a multi-week implementation. Their Git-backed Agent Versioning, staging workspaces, approval flows, and branch protections are the most engineering-serious change control in the category, and Watchtower QA monitors human agents as well as AI. Their Chime case study cites over a million calls per month at a 70% resolution rate, and the Five9 integration layers onto an existing CCaaS without rip-and-replace. If you have an enterprise budget, an existing contact center, and compliance requirements that demand structured reviews on every agent change, get the Decagon demo.
How fast can I get a live AI agent with Assistable?
Talk to sales about your workflow, expected volume and integration needs. Together we define pilot goals, testing and a rollout plan. Production timing is agreed around the deployment scope and your technical, security and procurement reviews.

Fair is fair

When Decagon is the right call

Decagon is the right call for large enterprise support organizations that want a vendor-embedded team to own a multi-week implementation. Their Git-backed Agent Versioning, staging workspaces, approval flows, and branch protections are the most engineering-serious change control in the category, and Watchtower QA monitors human agents as well as AI. Their Chime case study cites over a million calls per month at a 70% resolution rate, and the Five9 integration layers onto an existing CCaaS without rip-and-replace. If you have an enterprise budget, an existing contact center, and compliance requirements that demand structured reviews on every agent change, get the Decagon demo.

“After 18 months testing voice AI platforms including Bland.ai and Synthflow.ai… Assistable delivered flawlessly on over 25,000 calls in recent weeks.”
Maurice M.Assistable customer

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