Questions, answered honestly.

Wallet-based, pay-as-you-go. You top up your wallet, and every action (domain registration, mailbox-day, warmup block, sent email) meters against the balance. No per-seat fees. No tiers. No subscription. Unused balance is refundable on request.

$25/yr per domain (or bring your own free). $0.033/day per mailbox (~$1/month). $0.25 per 50-email warmup block. $1.50 per 1,000 sends. The full rate card is on the home page.

Sign-up is free. Your wallet starts at $0. You can configure everything (domains, mailboxes, sequences) before you load any funds. Funds are only charged when you actually use the resource.

Unused wallet balance is refundable on request. Open a support ticket and we process it within 5 business days back to the original payment method.

For 1M+ sends/month or agency accounts running 50+ tenants, yes — contact sales. Below that, the pay-as-you-go rates already beat every per-seat tier in the market.

Six layers, all enforced automatically: SPF/DKIM/DMARC at provisioning, real-mailbox warmup peering via CheddarInbox, per-mailbox reputation scoring, domain rotation enforcement at send-time, daily SendGrid stats reconciliation, and auto-pause on bounce/complaint thresholds.

See the full deliverability page for what each layer does and what dashboards expose them.

21-day default ramp from 1 email/day to production volume. You can adjust pace per-mailbox if you have a reason. Warmup runs on the CheddarInbox P2P network — real human-pattern engagement, not synthetic traffic.

If hard bounce rate exceeds 5% or complaint rate exceeds 0.1%, we auto-pause warmup and stop sending from that mailbox. The mailbox stays receivable so you don't lose replies. Manual unpause when the rates recover.

Yes. SMTP credentials plug into BoomSauce; sending routes through SendGrid for warmup and direct via your provider for production volume (or fully via SendGrid if you prefer).

No. Bringing your own domain is free — we wire DNS at Cloudflare while you keep the registrar. Or buy fresh domains through us at $25/yr if you want the bundle (registration + DNS + 5 mailboxes + free 1-page website).

Forty-nine TLDs supported, including .com, .net, .org, .io is via BYOD only. Full list on the buy-domain flow.

Every domain you buy through us gets a generated brand site at the apex. It signals a real business to mailbox providers (a domain that resolves to a website looks more legitimate than one that 404s) and gives recipients a place to land if they Google your sender.

Yes. Each platform has a dedicated migration guide with step-by-step instructions and honest tradeoffs (including what those platforms do better).

No. We push reply events to your CRM via webhook (Salesforce, HubSpot, Attio, custom). The deal lifecycle stays in your CRM where it belongs.

Yes — open API with documentation at /api-docs. Webhook events for sends, opens, replies, bounces, complaints. No rate-limit gates on standard endpoints.

Yes. Data Processing Addendum available on request. EU data flows handled per Standard Contractual Clauses. Full compliance posture on /compliance.

Every tenant provides their own physical mailing address at signup (CAN-SPAM Section 5(a)(5) requires the sender — you, not us — to include it). Unsubscribe links are appended automatically; suppression list is global per tenant and re-mailing a suppressed address is blocked at send-time.

No. We are a B2B-only platform. Sending cold marketing email to consumer addresses violates our Terms of Service and would burn the deliverability of every tenant on our infrastructure. We enforce this.