Giga vs. Sierra

Giga outperforms Sierra on speed, control, and ownership.

Giga gives you a first agent in minutes. Same enterprise depth. None of the black box.

Talk to sales
DoorDashCapital.comToastFlexRemedy MedsPostman
The honest comparison

With the pace of AI innovation, adopting Sierra puts you behind.

Time to production
Giga · A first agent in minutes; production in under 2 weeks
Sierra · Months, FDE-led builds
How agents get built
Giga · Plain language + Scout (AI forward-deployed engineer), with FDEs when you want them
Sierra · Forward-deployed-engineer services at the core of the product setup
Visibility & control
Giga · Full agent canvas, see and edit every policy and action
Sierra · Largely closed; changes routed through Sierra
Agent Improvement
Giga · Auto optimizes and flags gaps
Sierra · Heavily relies on FDE involvement, leading to slower improvement time
Channels
Giga · Voice, chat, email, SMS, WhatsApp, one agent, one policy graph
Sierra · Stitched per channel
Real-time hallucination correction
Giga · 4x lower than frontier models, dedicated correction agent, mid-response
Sierra · None

From enterprise evaluations and teams who ran both. Bring your scenario, we’ll show you live.

Industry leading metrics

Real numbers, in production.

  • RESOLUTION

    Over 90% resolved

    Handled in production without a human. 10–25% Containment lift in the first 120 days

    EACH DOT = 1% OF CONVERSATIONS
    90% Resolved10% To Human Agent
  • RESPONSE TIME

    Answers in under a second

    400ms voice response, day or night, in 90+ languages.

    TIME TO FIRST RESPONSE
    5.0sBEFORE
    instantHOLD TIME ELIMINATED
    0.4sAFTER
  • ACCURACY

    4x lower hallucination rate

    A dedicated correction agent pulls drift back mid-response, no other platform ships it.

    HALLUCINATION RATE VS. FRONTIER MODELS
    4xBEFORE
    −75%DRIFT CORRECTED
    1xAFTER
Customers

DoorDash ran the eval. They picked Giga.

Their hardest case, multi-party and real-time, with payments and refunds in scope.

DoorDashMarketplace
“Partnerships like this are critical to delivering better outcomes for consumers on a global scale.”
Andy Fang, Co-Founder at DoorDash
Andy FangCo-Founder, DoorDash
A DoorDash order handed off at a customer’s door
  • ToastRestaurant & retail

    Voice agents that resolve complex issues in real time, with clean handoff to your team when needed.

  • FlexFlexConsumer finance

    Real-time support agents that read and write to your systems to resolve issues end to end.

  • Remedy MedsTelehealth

    Confirms, books, and rebooks appointments, and reaches out to keep patients on their care.

FAQs

Frequently asked questions

Still have questions?

Most teams add us and run the same scenarios side by side. You’ll see a production-ready agent in days, usually before the other build is even scoped. We’ve never lost that bake-off.

BOOK A DEMO

Bring your hardest workflow. We’ll resolve it live.

Run the same scenarios against Giga and Sierra. We’ll show you a production-ready agent live, exactly how every part of it works, and how your team changes it themselves.

Comparisons based on independent testing conducted by Giga customers.

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Sierra Alternative — Giga vs. Sierra