# PingMyUsers > Communication APIs for vibe coders and AI agents, checked against their own docs. Operated by Sensaria AG. Facts carry an evidence status and a check date; unknown facts are marked as unknown, not as unsupported. ## Machine access - [MCP server](https://pingmyusers.com/mcp): read-only tools search_services, get_service, compare_services, get_pricing, get_ranking, get_payment_capabilities, recommend_services, get_dataset - [REST API OpenAPI](https://pingmyusers.com/api/v1/openapi.json) - [Methodology 2026.09-pre](https://pingmyusers.com/methodology) ## Open datasets (CC BY 4.0; CSV and JSON) - [MCP servers and agent skills](https://pingmyusers.com/data/ai-readiness): https://pingmyusers.com/data/ai-readiness.csv, https://pingmyusers.com/data/ai-readiness.json ## Rankings - [Transactional email](https://pingmyusers.com/rankings/transactional-email) - [SMS](https://pingmyusers.com/rankings/sms) - [OTP & verification](https://pingmyusers.com/rankings/otp) - [WhatsApp Business API](https://pingmyusers.com/rankings/whatsapp) ## Providers - [360dialog](https://pingmyusers.com/providers/360dialog): 360dialog, a German company that states it is an official Meta Business Solution Provider, sells access to the WhatsApp Business Platform through its Messaging API and Hub. Each phone number pays a monthly licence from $59; Meta's per-message fees are passed through with no 360dialog per-message fee. A free sandbox allows 200 test messages to your own number. - [Amazon SES](https://pingmyusers.com/providers/amazon-ses): Amazon Simple Email Service (SES) is the Amazon Web Services email service for sending through an HTTPS API or an SMTP interface and for receiving email on your own domains. Sending is billed per recipient in USD, either à la carte or on Essentials, Pro and Enterprise plans, and no always-free email quota is published. - [AWS End User Messaging](https://pingmyusers.com/providers/aws-end-user-messaging): AWS End User Messaging is the Amazon Web Services messaging service for SMS, MMS, RCS and voice (with Notify and an OTP API for one-time passcodes) and for WhatsApp through End User Messaging Social. Usage is billed pay-as-you-go in USD per message, and no free-forever messaging tier is published. - [Bird](https://pingmyusers.com/providers/bird): Bird, formerly MessageBird and based in Amsterdam, sells a transactional email API on monthly volume plans, pay-as-you-go SMS, WhatsApp messaging priced per message with Meta's fee included, and Bird Verify, which bills one-time codes at the delivering channel's rate. Prices are published in USD, and a free email plan covers 1,000 emails a month. - [Blip](https://pingmyusers.com/providers/blip): Blip (Curupira S.A., Belo Horizonte, formerly Take Blip) sells a conversational platform: WhatsApp Business API access as a Meta partner, a visual bot builder, AI agents, a human-agent desk and SMS. Platform plans are sold by contract in BRL; Blip Go, a WhatsApp plan for small businesses, is listed at R$389 per month on the Portuguese page (R$299 in the Help Center) with a 15-day trial. - [Botmaker](https://pingmyusers.com/providers/botmaker): Botmaker, founded in Argentina in 2016, sells a conversational platform with WhatsApp Business Platform access, AI agents, a live-chat desk, SMS and e-mail channels and a REST API. Plans are priced per conversation (daily user): Standard costs $149 per month in USD and R$600 in Brazil, with WhatsApp's own fees billed on top. - [Brevo](https://pingmyusers.com/providers/brevo): Brevo (legal entity Sendinblue SAS, Paris) sells transactional email through its API and SMTP relay inside plans priced by monthly email volume, with a free plan of 300 emails a day. SMS and WhatsApp are sold as prepaid credits priced per destination country; WhatsApp credits require the Professional plan. - [ClickSend](https://pingmyusers.com/providers/clicksend): ClickSend, an Australian company in the Sinch group, sells SMS, MMS and RCS through a REST API and a web dashboard. Credit is prepaid: the SMS rate depends on the destination country and on the size of the last top-up (Boost, Growth, Scale and Enterprise tiers). New accounts get a 14-day trial with AUD 2 of credit; email and voice are closed to new customers. - [Gupshup](https://pingmyusers.com/providers/gupshup): Gupshup sells WhatsApp Business API access as a Meta Solution Partner, through a self-serve platform billed from a prepaid USD wallet and through a partner portal for software vendors. The self-serve price list charges $0.001 per message on top of Meta's fee. One-time codes go out as WhatsApp authentication templates. Gupshup also sells SMS, RCS and voice, with no public price list. - [Infobip](https://pingmyusers.com/providers/infobip): Infobip, a CPaaS company registered in London with Croatian origins, sells SMS, a 2FA API for one-time codes, WhatsApp Business messaging and transactional email from one prepaid account. SMS and WhatsApp rates are published per country and email at one worldwide rate; the 2FA service has no published price. New accounts start with a 60-day trial. - [Mailgun](https://pingmyusers.com/providers/mailgun): Mailgun, a Sinch company based in San Antonio, Texas, sells transactional email through Mailgun Send: a REST API and SMTP relay with inbound routing, templates and signed webhooks, hosted in a US or an EU region. Paid plans are monthly subscriptions with included volume and per-1,000 overage; the Free plan allows 100 emails per day. - [Mailjet](https://pingmyusers.com/providers/mailjet): Mailjet, a Sinch company based in Paris, sells transactional email through the Send API and an SMTP relay next to a marketing email platform, with customer data hosted in the EU. Plans are monthly subscriptions in USD, EUR or GBP with included volume and per-1,000 overage; the Free plan allows 6,000 emails a month, capped at 200 a day. - [Mailtrap](https://pingmyusers.com/providers/mailtrap): Mailtrap, a product of the US company Railsware Products Studio LLC, sends transactional and bulk email through a REST API and SMTP and receives inbound email; its Email Sandbox for testing is priced separately. Sending plans are monthly USD subscriptions by volume, with a free-forever tier of 4,000 emails a month capped at 150 a day. - [Plivo](https://pingmyusers.com/providers/plivo): Plivo, based in Austin, Texas, sells SMS and MMS through its Messaging API, one-time codes through Plivo Verify and WhatsApp messaging as a Meta BSP. All three are sold to direct brands through sales on an Enterprise plan with a USD 1,000 minimum monthly commitment; list rates are published in USD. - [Postmark](https://pingmyusers.com/providers/postmark): Postmark, owned by ActiveCampaign, sends and receives application email through a REST API and SMTP, with separate transactional and broadcast message streams. Plans are monthly USD subscriptions with included volume and per-1,000 overage, plus a free developer plan of 100 emails a month. - [Resend](https://pingmyusers.com/providers/resend): Resend, operated by the US company Plus Five Five, Inc., sells transactional email through a REST API and an SMTP relay, plus contact-based marketing email. Plans are monthly USD subscriptions with a free-forever tier of 3,000 emails a month, capped at 100 a day, and no free trial. - [Twilio SendGrid](https://pingmyusers.com/providers/sendgrid): Twilio SendGrid, owned by Twilio since 2019, sends transactional email through the v3 Mail Send API and an SMTP relay on monthly plans that start at $19.95 for 50,000 emails. New accounts get a 60-day free trial capped at 100 emails a day; there is no free-forever Email API plan. - [SendPulse](https://pingmyusers.com/providers/sendpulse): SendPulse Inc., a New York company founded in 2015, sells transactional email through an SMTP relay and API, SMS and WhatsApp Business API alongside marketing email, chatbots and a CRM. The SMTP service has a free plan of 12,000 emails a month; SMS is prepaid per message; WhatsApp needs a paid chatbot plan plus per-template fees. Prices follow the visitor's location. - [Sinch](https://pingmyusers.com/providers/sinch): Sinch, a Stockholm-based group, sells SMS, WhatsApp and other channels through its Conversation API and one-time codes through its Verification API. SMS rates are published per country with a prepaid self-serve account, while WhatsApp needs a postpay account arranged through Sinch. - [SMTP2GO](https://pingmyusers.com/providers/smtp2go): SMTP2GO, run by Sand Dune Mail Ltd in Christchurch, New Zealand, relays application email over SMTP and a REST API from US, EU and Australian data centers, and sells SMS as a paid add-on. Email plans are monthly or annual USD subscriptions with included volume and per-1,000 overage; the Free plan allows 1,000 emails a month. - [Telnyx](https://pingmyusers.com/providers/telnyx): Telnyx, based in Austin, sells SMS and MMS through its Messaging API, one-time codes through Telnyx Verify, WhatsApp messaging as a WhatsApp BSP and transactional email through an Email API that is in beta. All four are billed pay-as-you-go in USD, with a $5 trial credit and no free-forever tier. - [Textmagic](https://pingmyusers.com/providers/textmagic): Textmagic (Textmagic Limited, UK; parent TextMagic AS, Tallinn) sells a business texting platform with an SMS REST API, email campaigns and a shared inbox. SMS is prepaid pay-as-you-go in USD, EUR, GBP or AUD. Textmagic states that sending is regional, WhatsApp is inbound-only and there is no OTP API. - [Treble](https://pingmyusers.com/providers/treble): Treble (Treble.ai, Inc., incorporated in Delaware) is a Meta WhatsApp Business Solution Provider focused on Latin America. Its WhatsApp-only platform combines a no-code flow builder, AI agents, a shared agent inbox, CRM integrations and a small REST API. The base plan starts at USD 399 per month; volumes and final fees are agreed with sales. - [Twilio](https://pingmyusers.com/providers/twilio): Twilio, based in San Francisco, sells SMS and MMS through Programmable Messaging, one-time codes through Twilio Verify and WhatsApp messaging through the Twilio API for WhatsApp. All three are billed pay-as-you-go in USD, with a 30-day trial and no free-forever messaging tier. - [Vonage](https://pingmyusers.com/providers/vonage): Vonage, an Ericsson subsidiary headquartered in New Jersey, sells SMS through its SMS and Messages APIs, one-time codes through the Verify API and WhatsApp through the Messages API. Usage is prepaid or invoiced in EUR or USD after a free trial credit, with no free-forever messaging tier. - [WATI](https://pingmyusers.com/providers/wati): WATI, a product of Hong Kong-based Clare.AI Limited, is a WhatsApp Business API platform with a shared team inbox, no-code chatbots, campaigns and a REST API. It sells Growth, Pro and Business subscriptions (USD in the US, BRL in Brazil, MXN in Mexico) and charges WhatsApp messages from a prepaid credit wallet at rate-card prices that include Meta's fee. - [Zenvia](https://pingmyusers.com/providers/zenvia): Zenvia, a Brazilian company based in São Paulo, sells WhatsApp, SMS, RCS, e-mail and a two-factor authentication API through Zenvia Customer Cloud. Plans combine a software plan with a monthly channel package priced in BRL in Brazil and in MXN in Mexico; Brazilian customers pay by card or boleto. ## Guides - [Amazon SES Alternatives (2026): 13 Email APIs Compared](https://pingmyusers.com/alternatives/amazon-ses-alternatives): Amazon SES alternatives ranked by our transactional email rating, with prices at 10,000 emails, free tiers, MCP, OAuth, webhook signing and idempotency keys. - [SendGrid Alternatives (2026): 13 Email APIs Ranked](https://pingmyusers.com/alternatives/sendgrid-alternatives): SendGrid alternatives ranked by our transactional email rating: free plans, prices at 10k and 100k emails, MCP, OAuth and webhooks, checked 24 September 2026. - [Twilio Alternatives (2026): 15 SMS, OTP and WhatsApp APIs](https://pingmyusers.com/alternatives/twilio-alternatives): Twilio alternatives ranked by our SMS rating, with OTP and WhatsApp places, US prices for 1,000 texts, Verify, MCP and OAuth, checked 24 September 2026. - [SMS Sender ID Rules by Country 2026](https://pingmyusers.com/blog/sms-sender-id-rules-by-country): Which SMS sender IDs work in 24 countries: alphanumeric support, sender ID registration, lead times and what carriers do with unregistered sender names. - [CPaaS Meaning: Communications APIs, Pricing and Vendors](https://pingmyusers.com/glossary/cpaas): CPaaS means cloud APIs for SMS, voice, WhatsApp, email and one-time codes: the building blocks, how pricing stacks up and how 27 providers compare by type. - [What Is llms.txt? Format, llms-full.txt and AI Crawlers](https://pingmyusers.com/glossary/llms-txt): llms.txt is a proposed Markdown file that maps a site for AI agents: format, llms-full.txt, robots.txt differences, crawler support and which APIs publish one. - [What Is an MCP Server? Model Context Protocol Explained](https://pingmyusers.com/glossary/mcp-server): An MCP server gives AI agents tools and data over the Model Context Protocol: local vs remote, OAuth 2.1 sign-in, official vs community servers and the risks. - [SMS Gateway: What It Is, How It Works, What It Costs](https://pingmyusers.com/glossary/sms-gateway): An SMS gateway links apps to mobile carriers: HTTP API vs SMPP, delivery receipts, sender registration and what 1,000 texts cost in the US, Brazil and Mexico. - [What Is SMTP? How It Works, Ports and Authentication](https://pingmyusers.com/glossary/smtp): SMTP is the protocol that sends email from apps to relays and between servers: how a session works, reply codes, ports 25, 587 and 465, and SMTP AUTH. - [What Is a Webhook? Definition, Examples and Security](https://pingmyusers.com/glossary/what-is-a-webhook): A webhook is an HTTP request an app sends to your URL when an event happens. How it differs from polling, how retries and HMAC signatures work, with examples. - [A2P 10DLC Registration: 2026 Guide](https://pingmyusers.com/guides/a2p-10dlc-registration-guide): 10DLC registration step by step: brand, vetting, campaign, what reviewers reject, how long it takes, and fees at six SMS providers checked in September 2026. - [Evolution API vs WhatsApp Cloud API 2026: Ban Risk, Cost](https://pingmyusers.com/guides/evolution-api-vs-whatsapp-cloud-api): Evolution API's WhatsApp Web mode vs Meta's Cloud API: what WhatsApp's terms say, ban risk, Brazil message rates vs self-hosting, and BSPs for Brazil. - [Toll-Free Number Texting Verification](https://pingmyusers.com/tutorials/toll-free-texting-verification): Get a toll-free number verified for texting: required fields, opt-in proof, sample messages, review times, fees and rejection fixes at six SMS providers. - [WhatsApp Business Verification Steps](https://pingmyusers.com/tutorials/whatsapp-business-verification): Meta business verification for WhatsApp API users: who needs it, documents for the US and Brazil, Security Center steps, display names, limits, rejections.