Transparent pricing. $20 to start, no sales call.
One credit pool powers every call, message, and AI action — and the plans below are the same live plans you'll see in signup, entry tier first, cost per call included.
Start small. Scale when it pays for itself.
Your plan sets a monthly credit budget shared by all your workspaces. A credit always costs $0.01 — higher tiers include more of them and make the same AI and telephony work consume fewer.
What a call actually costs, up front.
Per-interaction cost is usually the number you only learn at the end of a sales process. Here it is before you've talked to anyone — computed from the same plan data as checkout, with the assumptions stated underneath.
- One flat credit price — every credit costs $0.01, whether it's included in your plan or extra usage. Plans differ in included credits and discounts, never in the price of a credit.
- Channel and length drive usage — voice consumes credits per minute (the estimate assumes a 5-minute call), SMS per segment, email per message, and AI actions by model and conversation length.
- Higher tiers discount the work, not the credit — a bigger plan makes the same call consume fewer credits (discounted AI, lower telephony rates), which is why cost per call falls as you move up. The credit itself never changes price.
- Carrier costs are separate — telephony carrier charges for voice and SMS are billed separately from credits.
Pricing questions, answered.
The short version: $20 gets you started with credits already on the clock, credits are a flat $0.01, and a BAA is a conversation — not a plan-gated mystery.
What does it cost to get started?
Gravity Rail is $20 a month and includes 2,000 credits — roughly 23 voice calls or 50 chats, enough to put a real Workflow in front of real people. You create your organization through self-serve signup without talking to anyone, and you can cancel anytime. Every call, message, and AI action draws from one credit pool shared across all your workspaces. If Gravity Rail turns out not to be for you, email us in your first month and we will refund it.
Why is there no free tier?
Because a $0 plan includes $0 of credits, and credits are what make the product do anything. A free signup would have hit a "you are out of credits" wall before sending its first message — which is a worse experience than a clear $20 price. Gravity Rail starts you with a real balance instead, so the first thing you meet is the product and not a paywall.
What is a credit, and what happens if I use more than my plan includes?
Credits are the unit for all usage-based work on Gravity Rail: AI conversations, voice minutes, SMS segments, and email. A credit always costs $0.01 — the same price whether it is included in your plan or bought as extra usage, with no overage penalty. Auto-reload and a monthly spend limit in your billing settings keep extra usage under your control.
Do unused extra usage credits roll over?
Extra usage credits do roll over. Included plan credits reset at the start of each billing period, and unused included plan credits do not roll over.
What is the difference between monthly and annual billing?
Every paid plan can be billed monthly or annually. Annual billing is discounted — use the billing toggle on this page to compare, and each plan card shows its current savings versus monthly. The exact numbers are visible before you commit to anything.
What languages do Agents speak?
Text channels — SMS, email, and web chat — work in all major languages, and replies match the language the patient writes in. Voice calls support up to 32 languages, depending on your workspace's configured voice stack, and Agents detect the language a caller is speaking on every turn — if a patient switches languages mid-call, the Agent switches with them.
Can we get a BAA (HIPAA Business Associate Agreement)?
Business Associate Agreements are available for eligible plans. Scope and terms are confirmed with our team before PHI flows. To request current security documentation or a BAA, contact security@gravityrail.com.
Do I need a sales call to get started?
No. The plans on this page are the same live plans the signup flow uses — you can create an organization yourself, in minutes, without talking to anyone. Demos and pilots are there if you want them: book a demo for a 30-minute walkthrough, or ask about Gap Zero, our structured patient-outreach pilot, for a guided first program. Whichever way you start, you land on the same platform and the same credit-based pricing model.
When should we talk to your team instead?
Talk to us when you want a BAA and security review in place before PHI flows, when your volume justifies negotiated terms — negotiated accounts carry custom AI discounts and telephony rates — or when you would like help designing your first Workflow. Everything else on this page works self-serve.
Start today for $20.
Create a workspace on Gravity Rail, with 2,000 credits already on the clock — and when procurement asks for the numbers, send them this page.
or email us at sales@gravityrail.com