This is an info Alert.
x402 Logo
  • Product
    • Become Agent-Ready
      • Merchants
        Agentic Commerce — list your store across ChatGPT, Gemini, Claude & Perplexity
      • Publishers
        Monetize your content when AI agents read, cite, or train on it
      • SaaS Companies
        Treat AI agents as first-class customers with agent-priced checkout
    • Monetize
      • Monetize MCP Server
        Charge per call on any MCP server in 2 minutes
      • Monetize AI Agents
        Turn n8n, Zapier, Activepieces workflows into revenue
      • Agent Feed
        Pay-per-query access to licensed publisher content for your agents
  • Resources
    • xpay Ecosystem
      • xpay✦ Tools
        1,000+ pay-per-use tools for your AI agents
      • Agent-Ready SaaS Index
        25,481 SaaS scored on agent-buyability
      • SaaS Pricing Database
        Pricing pages indexed across 1,000+ categories
      • GitHub
        Open source repositories
    • Agent Building
      • Agent Frameworks
        AI frameworks for building multi-agent systems
      • x402 Integration
        AI frameworks with x402 payment integration
      • Networks
        Blockchain networks supporting x402
    • Company
      • About xpay✦
        Our mission, products, and protocols
      • Blog
        Latest insights and updates
      • Docs
        Complete xpay documentation
  • Pricing
  • Blog
  • Docs
Get Started
  1. Home

  2. /
  3. SaaS Pricing

  4. /
  5. Kingmailer

Kingmailer logo

Kingmailer Pricing

kingmailer.co · Transactional Email · refreshed 2026-05-06
Transactional Email
Free tier
Self-serve checkout
Quick answer

Kingmailer pricing starts at $4.99/mo (or $4.08/mo billed annually) for the 5,000 emails plan. 5 tiers total including a free tier.

Page fetched 2026-05-09 · kingmailer.co · Tier-based subscription
Kingmailer pricing page screenshot — https://kingmailer.co/pricing/
Source · live pricing page on 2026-05-06

kingmailer.co/pricing/

Open
Pricing
Kingmailer pricing
As of 2026-05-09 · kingmailer.co/pricing/
5,000 emails
$4.99/mo
or $4.08/mo billed annually
Full SMTP support
High deliverability (99% inbox rate)
Privacy‑focused, no KYC
Email API & SMTP access
WordPress plugin
10,000 emails
$9.99/mo
or $6.58/mo billed annually
Full SMTP support
High deliverability (99% inbox rate)
Privacy‑focused, no KYC
Email API & SMTP access
WordPress plugin
20,000 emails
$19.99/mo
or $13.25/mo billed annually
Full SMTP support
High deliverability (99% inbox rate)
Privacy‑focused, no KYC
Email API & SMTP access
WordPress plugin
50,000 emails
$49/mo
or $40.75/mo billed annually
Full SMTP support
High deliverability (99% inbox rate)
Privacy‑focused, no KYC
Email API & SMTP access
WordPress plugin
100,000 emails
$99/mo
or $82.42/mo billed annually
Full SMTP support
High deliverability (99% inbox rate)
Privacy‑focused, no KYC
Email API & SMTP access
WordPress plugin
Cost calculator
See your real cost on each plan

Adjust seats to compare Kingmailer plans side-by-side and check the annual break-even.

5,000 emails
$4.99/mo · $4.08/mo billed annually
$4.99/mo
Save 18% annually → $48.96/yr
10,000 emails
$9.99/mo · $6.58/mo billed annually
$9.99/mo
Save 34% annually → $78.96/yr
20,000 emails
$19.99/mo · $13.25/mo billed annually
$19.99/mo
Save 34% annually → $159/yr
50,000 emails
$49.00/mo · $40.75/mo billed annually
$49.00/mo
Save 17% annually → $489/yr
100,000 emails
$99.00/mo · $82.42/mo billed annually
$99.00/mo
Save 17% annually → $989/yr

Annual vs. monthly: on the 5,000 emails plan you save $10.92/yr by committing annually instead of paying month-to-month — but only if you keep using Kingmailer for a full 12 months.

Open live pricing pageSee agent-readiness analysis
Frequently asked
Kingmailer pricing FAQ

Kingmailer pricing starts at $4.99/mo for the 5,000‑email plan; no free tier; paid plans up to $99/mo. Billed monthly or annually.

Kingmailer's cheapest business-usable plan is 5,000 emails at $4.99/mo. lowest paid tier suitable for small‑business transactional email volume.

Yes — Kingmailer publishes a free tier. 7‑day free trial, no credit card required.

Yes — Kingmailer's purchase motion is self-serve. A checkout URL is published on the pricing page. No demo is required.

xpay scored Kingmailer as agent-ready: every advertised plan is self-serve with public pricing. Kingmailer's pricing URL resolves, but plan structure is not surfaced clearly enough for an agent to enumerate without hand-parsing. No per-unit price was found on the page; an agent has no direct way to estimate the cost of a single task. Self-serve signup exists alongside a sales-led / custom tier. No public API documentation URL was discovered. A free or freemium tier is offered. For the full purchase simulation see the linked Agent-Ready Index scorecard.

In the Transactional Email category, xpay's Agent-Ready Index lists alternatives ranked by their ability to support AI agent purchase. Visit the agent-readiness scorecard for Kingmailer to compare with 3 nearest peers.

Alternatives in Transactional Email
Top Kingmailer alternatives by pricing transparency
Mailgun pricing
mailgun.com
Amazon SES pricing
aws.amazon.com
Mailchimp Transactional Email pricing
mailchimp.com
Postmark pricing
postmarkapp.com
UniOne pricing
unione.io
AhaSend pricing
ahasend.com
Zoho ZeptoMail pricing
zoho.com
Aritic Mail pricing
aritic.com
Browse all Transactional Email alternatives →
AI agent readiness
Can an AI agent buy from Kingmailer?
Partially Agent-Ready

59

/ 100 in xpay's Agent-Ready SaaS Index

Kingmailer scores 59/100 on xpay's Agent-Ready Index v2: partial pricing visibility; self-serve checkout is available; usage-based / per-token pricing is published.

See the full scorecardIncludes the 6-step agent purchase simulation, score breakdown across 7 dimensions, and the one-line fix that would lift Kingmailer into the Agent-Ready Verified band.
Quick facts
At a glance
Free access

7‑day free trial, no credit card required


Billing cycle

Monthly or annual


Lowest paid

$4.99/mo · $4.08/mo if annual


Self-serve checkout

5 tiers


Tier count

5


Pricing model

Tier-based subscription

More Transactional Email alternatives
Most agent-ready

Sweego

sweego.io
71

Doppler Relay

dopplerrelay.com
65

SMTP2GO

smtp2go.com
64

SMTP

smtp.com
56

SocketLabs

socketlabs.com
50

Kingmailer pricing summary derived from a live read of https://kingmailer.co/pricing/ on 2026-05-06. For the agent-readiness assessment — including the 6-step purchase simulation and a per-dimension scorecard — see xpay's Agent-Ready SaaS Index entry for Kingmailer.

Explore SaaS pricing across categories

25,480+ SaaS scored on agent-buyability — browse by readiness band, category, or jump straight to a pay-per-run tool on xpay.tools.

Browse by category
CRM(500)Content Creation(414)Chatbots(407)AI Writing Assistant(394)Social Media Management(381)Website Builder(343)Seo(317)Project Management(288)Scheduling(270)Survey User Feedback(265)Email Marketing(252)Hr(237)All categories
Available pay-per-run on xpay.tools
FirecrawlExaTavilyApolloHunterJina AIBright DataContext7Alpha VantageReplicatePerplexityParallelBrowse all xpay.tools
x402 Logo

The agent-readiness stack for the AI shopping era — helping merchants, publishers and SaaS companies get discovered, cited and transacted with by ChatGPT, Perplexity, Claude, Gemini and the custom shopping agents underneath them.

CompanyAgentically Inc. (d/b/a xpay✦)1875 Mission St, Ste 103San Francisco, CA 94103, United Stateslegal@xpay.sh · privacy@xpay.sh
or ask your AI app
Company
About xpayAgency PartnersGitHubDiscordllms.txt
DevelopersDocumentationAPI ReferenceSDKs & LibrariesQuickstart GuideOpenAPI Spec
Stay Updated
Occasional product updates and agent-readiness playbooks from xpay (Agentically Inc.) — typically a couple of emails a month. Double opt-in: we email you a link to confirm before sending anything, and every email has one-click unsubscribe.
Social
  • For Publishers
    • News
    • Finance
    • Dev / Tech
    • Travel
    • View all verticals
  • Agent Feed
    • AI Search Engines
    • RAG Builders
    • Browser Agents
    • Vertical Research
    • Browse full catalog
  • Agent-Ready Index
    • SaaS Pricing Database
    • Agent-Ready SaaS Index
    • Verified band
    • AI & ML
    • Sales & CRM
  • Products
    • Pricing Widget
    • Monetize MCP Server
    • Paywall
    • Smart Proxy
    • Monetize AI Agents
    • xpay x402 Facilitator
  • Agentic Economy
    • Timeline
    • Resources
    • Manifesto
    • Stack
  • Agentic Commerce
    • Get listed
    • xpay Listings · Amazon + Google
    • Pricing
    • Free audit
    • Shopify
    • WooCommerce
    • Apparel & Accessories
    • Health & Beauty
    • Overview
  • Commerce Index
    • Agentic Commerce Ready Index
    • Methodology
    • Pet brands · WooCommerce
    • Pet brands · Shopify
  • Marketplace
    • 🛍️ xpay.deals — agentic storefront for deals
  • Protocols
    • Overview
    • x402
    • MPP
    • UCP
    • ACP
    • AP2
    • TAP
    • A2A
  • Agent Frameworks
    • Overview
    • LangChain
    • CrewAI
    • Claude MCP
    • AutoGPT
    • LangChain vs Mastra
    • LangGraph vs Pydantic AI
  • Company
    • About xpay
    • Blog
    • Docs
    • GitHub

© 2025 Agentically Inc. All rights reserved.
Privacy PolicyTerms of UseAcceptable Use Policy