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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 is self-serve: sign up, buy a number in-app, and put an agent on a live call in minutes at $0.07/min all-in.

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<500 ms latency·99.99% uptime·4.7/5 on Trustpilot

The bottom line

Assistable

Assistable runs on its own carrier-grade voice stack, so there is nothing to assemble before the first call. You sign up, the platform builds your first assistant during onboarding, you buy a US or Canadian local number in-app, and the first live call happens in minutes. Immutable numbered versions with one-click rollback, warm transfers with ordered fallback hunting, timezone-aware outbound campaigns, and an LLM judge that grades every call are all in the product at published pay-as-you-go rates: $0.07/min voice all-in, $0.02 per message.

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

From signup to an agent answering a real phone call.

Assistable

Sign up at platform.assistable.ai and the platform creates your first assistant during onboarding, grants $10 in usage credit, and sells you a real US or Canadian local phone number in-app. The first live call happens in minutes, in one sitting, with no sales call and no engineering. Full production rollouts run 2-3 day deploys. There is no SDK to integrate, no STT/TTS/LLM providers to wire together, and no telephony account to create.

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

Self-serve signup, pay as you go·First assistant created automatically during onboarding·$10 in usage credit and a free local phone number at signup·US and Canadian local numbers purchasable in-app·Full production rollouts: 2-3 day deploys

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·<500 ms latency, 0.4s median answer, 99.99% uptime SLA

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
AssistableYes
DecagonNo
Time to first live call
AssistableMinutes, in one sitting
Decagon~6-week phased rollout per their setup guide
Full production rollout
Assistable2-3 day deploys
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
AssistablePay as you go, free signup
DecagonCustom quote, per-conversation or per-resolution
Voice
Assistable$0.07/min all-in
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

Live the day you sign up

Onboarding creates your first assistant, grants $10 in calling credit, and sells you a real local number in-app. The first live call happens in minutes, and full production rollouts run 2-3 day deploys.

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 is self-serve: sign up, buy a number in-app, and put an agent on a live call in minutes at $0.07/min all-in.
Is Assistable or Decagon more cost effective?
Assistable is usage-based at $0.07 per minute for voice, all-in, and $0.02 per message, with no platform fee, no seat fees, and free pay-as-you-go signup. Decagon's published pricing model is custom quote. Assistable bundles telephony, model, and voice into one per-minute rate, so there are no per-component add-ons to reconcile.
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?
Signup is self-serve. Onboarding creates your first assistant, grants $10 in usage credit, and lets you buy a US or Canadian local number in-app, so the first live call happens in minutes without a sales call. Full production rollouts run 2-3 days.

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.

Results

Take their word for it.

Real operators, verified reviews, and one 18-month evaluation that ended with 25,000 flawless calls.

Platform lifetime

m+managed conversations

Across voice, SMS, WhatsApp, and chat.

Reliability

% uptime

Production uptime, backed by SLA.

Speed

s median answer

From first ring to answered, on every channel.

Verified customer · 18-month evaluation

25,000 calls delivered flawlessly.

“After 18 months testing voice AI platforms including Bland.ai and Synthflow.ai… Assistable delivered flawlessly on over 25,000 calls in recent weeks. It checks all the boxes with built-in features that more mature platforms haven’t integrated yet.”

Maurice M.Verified customer

Backed by a Shark

“Assistable AI is redefining business efficiency.”

KHKevin HarringtonKevin HarringtonOriginal Shark, Shark Tank
Watch →
Trustpilot4.7/5 · 35 verified reviewsHighLevel4.5/5 · 126,000+ marketplace downloads
  • “I've tested a lot of AI and automation tools, and most fall apart once you try to scale. Assistable is the real deal.”
    Jamie WVerified Trustpilot review
  • “I have been using Assistable for about 10 months, and it has changed my business completely. The voice AI quality is unmatched.”
    Travis HolzemVerified Trustpilot review
  • “The conversational quality and flexibility are amazing. Top notch tech and service from the entire team.”
    Eric KnellerVerified Trustpilot review
  • “They make it so easy to get started with voice AI. The onboarding was smooth and the results were immediate.”
    Pam VinjeVerified Trustpilot review
  • “There is no better conversational AI voice bot. There are a ton of players in the market and Assistable leads.”
    Lowe SmithVerified Trustpilot review
  • “Assistable has been a game changer for my business and is way easier to use than any alternative I've tried.”
    Greg PfefferVerified Trustpilot review
  • “Assistable AI was the best decision we have made for our company in a long time. Excellent product and team.”
    Get Amplified MarketingVerified Trustpilot review
  • “Been using Assistable for several months and it has completely changed how our team handles inbound inquiries.”
    ATVerified Trustpilot review
  • “There is no better conversational AI voice bot. There are a ton of players in the market and Assistable leads.”
    Lowe SmithVerified Trustpilot review
  • “Assistable has been a game changer for my business and is way easier to use than any alternative I've tried.”
    Greg PfefferVerified Trustpilot review
  • “Assistable AI was the best decision we have made for our company in a long time. Excellent product and team.”
    Get Amplified MarketingVerified Trustpilot review
  • “Been using Assistable for several months and it has completely changed how our team handles inbound inquiries.”
    ATVerified Trustpilot review
  • “I've tested a lot of AI and automation tools, and most fall apart once you try to scale. Assistable is the real deal.”
    Jamie WVerified Trustpilot review
  • “I have been using Assistable for about 10 months, and it has changed my business completely. The voice AI quality is unmatched.”
    Travis HolzemVerified Trustpilot review
  • “The conversational quality and flexibility are amazing. Top notch tech and service from the entire team.”
    Eric KnellerVerified Trustpilot review
  • “They make it so easy to get started with voice AI. The onboarding was smooth and the results were immediate.”
    Pam VinjeVerified Trustpilot review

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