InboxPolicy vs Emailable
By Aria Pramesi, founder of InboxPolicy · Updated July 4, 2026
InboxPolicy is an API-first send-decision service built for AI agents: $0.01 per verification via x402, credit packs from $3.16/1k, an MCP server, and a send/review/avoid action instead of a status field. Emailable is a dashboard-first suite for bulk uploads and team workflows. Pick Emailable for manual list cleaning in a UI, InboxPolicy when an agent needs a programmatic send decision.
What does each tool actually do?
InboxPolicy runs syntax, MX, and live SMTP checks against its own verification engine, then applies a deliverability policy that turns that evidence into one of five actions: send, send_with_caution, review, retry_later, or avoid, plus a confidence score and the normalized signals. There is no raw status field to interpret; the API makes the call.
Emailable is a dashboard-first email verification suite built around bulk uploads and integrations. It fits teams that want to drop a CSV into a UI, run a list cleanse, and export results, rather than get a per-address decision back through code.
How does pricing compare?
InboxPolicy charges $0.01 per fresh verification pay-per-call through the x402 protocol (USDC on Base, no account, no API key). For prepaid volume, credit packs run Starter $5 for 1,000 credits ($5.00/1k), Builder $19 for 5,000 ($3.80/1k), and Growth $79 for 25,000 ($3.16/1k), with volume pricing available on request.
InboxPolicy has no free tier: the $0.01 x402 call is the trial, a deliberate choice because free tiers attract list-cleaning abuse. Two result types can cost 0 credits: cache re-verification within 72 hours (returns from_cache) and malformed-email rejection before SMTP.
Emailable lists pay-as-you-go pricing from $7.60/1k ($38 for 5,000) or $6.46/1k on subscription ($32.30/month for 5,000).
Which one fits an AI agent workflow?
InboxPolicy ships an MCP server exposing decide_send, verify_email, batch tools, and usage, so an agent can call it directly without a human touching a dashboard. The REST API adds idempotency keys, per-item batch results, async batches up to 50,000 emails, and signed completion webhooks.
The x402 flow is built for machine-to-machine payment: a keyless request returns HTTP 402 with machine-readable payment requirements, the agent pays $0.01 in USDC on Base via a PAYMENT-SIGNATURE header, and gets back its decision plus an on-chain settlement receipt. Emailable has no MCP server and no x402 support; it's built for a human driving a dashboard, not an agent making its own send decision.
When does Emailable actually win?
If the job is uploading a CSV, cleaning a list inside a dashboard, and pushing results into other tools via integrations, that's Emailable's home turf and InboxPolicy isn't built for that workflow. InboxPolicy is honest about this: a dashboard-first marketing suite with CSV uploads is a better fit for Emailable or Kickbox than for an API built around per-call agent decisions.
If the goal is one-shot cleaning of a huge scraped list at the lowest possible cost, MillionVerifier is the high-volume option at $3.90 per 1,000 entry down to $0.45 per 1,000 at 1M. InboxPolicy's 25,000-credit Growth pack has a lower unit price at $3.16/1k, while MillionVerifier's 10,000-credit entry purchase costs less overall at $39. If spam-trap and abuse-address detection is the priority, ZeroBounce carries a dedicated database for that.
What do you get on every InboxPolicy call that a status field doesn't give you?
The send-decision response carries normalized signals for catch-all, disposable, free, and role-account status alongside the action. Unknown results map to review. Catch-all results map to review by default or send_with_caution under aggressive strictness; neither is silently marked safe, which matters because roughly 30-40% of B2B addresses sit on catch-all domains where a status-only tool has to guess.
Accuracy sits around 90% typical valid-verdict agreement with MillionVerifier across 2M+ verifications on the prior engine, though this varies by vertical and drops to as low as 60% in some. That's a directional data point, not a formal recent benchmark, and it's not a claim we can make about Emailable's engine since no comparable figure was provided.
| Dimension | InboxPolicy | Emailable |
|---|---|---|
| Interface | API and MCP server, built for agents | Dashboard, built for bulk uploads and integrations |
| Output | Action (send, send_with_caution, review, retry_later, avoid) with confidence score and normalized signals | Status fields (qualitative, no public detail on exact fields) |
| Pricing | $0.01/verification via x402, or credit packs from $3.16/1k (Growth, $79 for 25,000) | ~$6.46/1k sub; ~$7.60/1k payg |
| Free tier | None; $0.01 x402 call is the trial. eligible cache hits for the same normalized address and strictness within 72 hours when force_refresh is false, malformed rejection (0 credits) | 250 signup credits (live pricing reviewed 2026-07-20) |
| Agent/payment integration | MCP server (decide_send, verify_email, batch, usage); x402 keyless pay-per-call in USDC on Base | No MCP, no x402 |
| Batch handling | Async batches up to 50,000 emails, signed completion webhooks, idempotency keys | Bulk CSV uploads through dashboard |
| Best for | An agent needing a programmatic send/no-send decision | A team running list cleanup manually in a UI with integrations |
Frequently asked questions
Is InboxPolicy cheaper than Emailable?
Emailable lists $7.60 per 1,000 pay-as-you-go ($38 for 5,000) or $6.46 per 1,000 on subscription ($32.30/month for 5,000). InboxPolicy charges $0.01 per fresh verification via x402, or as low as $3.16 per 1,000 on its $79 Growth credit pack, so InboxPolicy's 25,000-credit Growth pack has the lower unit price while Emailable fits teams that need its dashboard workflow.
Does Emailable have an MCP server or agent integration?
No. Emailable is a dashboard-first suite built around bulk uploads and integrations for human-driven workflows. InboxPolicy ships an MCP server with decide_send, verify_email, batch, and usage tools, plus x402 pay-per-call support, specifically for AI agents calling it directly.
Can I try InboxPolicy for free before committing?
There's no free tier. The $0.01 per-call x402 price is the trial, a deliberate design choice because free tiers tend to attract list-cleaning abuse. Two result types can cost 0 credits: 72-hour cache re-verification and malformed-email rejection before SMTP.
What does InboxPolicy return instead of a status field?
One of five actions: send, send_with_caution, review, retry_later, or avoid, along with a confidence score and the normalized signals. Unknown addresses map to review. Catch-all addresses map to review by default or send_with_caution under aggressive strictness, rather than being silently marked safe, since roughly 30-40% of B2B addresses sit on catch-all domains.
When should I use Emailable instead of InboxPolicy?
When the job is uploading a CSV and cleaning a list inside a dashboard with team integrations, rather than getting per-address decisions back through an API or agent. That's a dashboard-first workflow InboxPolicy isn't built for.
How accurate is InboxPolicy's verification?
Roughly 90% typical valid-verdict agreement with MillionVerifier across 2M+ verifications on the prior engine, though this varies by vertical and can drop as low as 60% in some. This is a directional data point, not a formal recent benchmark, and no comparable figure is available for Emailable.