SphereMail Alternatives (September 2025)

US Global Mail offers virtual address and digitize your paper mail today. We provide online solutions for enterprise mail and virtual mailboxes.

Seamlessly handle your traditional mail online. Select from our wide range of nationwide mailing addresses. Scan and access your mail at your convenience, from anywhere, and at any time.

Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.

Selection of virtual mailboxes, residential addresses, and physical business addresses to manage your mail, maintain compliance, and open bank accounts.

Incoming Email for your Web Application, send and receive email via HTTP Post in the Cloud

Elevate your marketing with Mailbox Power’s automated platform, designed to streamline direct mail and gift campaigns. Effortlessly schedule, send, and manage your direct mail pieces or personalized gifts over any timeframe. Our comprehensive service takes care of packaging, timing, and mailing, freeing you from the hassle of post office visits. Experience seamless direct mail and gifting solutions that save time and enhance your outreach. Say goodbye to manual processes and hello to efficiency with Mailbox Power.

Mailosaur removes the frustration of testing everything a user might do. 
Test password resets, replies, two-factor logins, and more.

Simply Noted writes handwritten notes, letters, thank you notes, and cards using robots with real penmanship. Ideal for all businesses.

Virtual Mailbox with Postal Mail Scanning & Mail Forwarding Services. We scan your postal mail, forward your mail & mail your checks to the bank.

Lob, the only automated direct mail platform that transforms your direct mail into intelligent mail that is scalable, personalized, and measurable. Book a demo!

Manage your mail securely with iPostal1's Digital Mailbox. We receive your mail which you can view & manage on the iPostal1 App or website. Stop mail theft and get started today!

Postalytics® is direct mail automation software that sends personalized direct mail from your CRM and analyzes delivery & response.

Integrate in minutes and send transactional emails via our REST API or SMTP. Scale with our reliable global infrastructure and deliver emails to your customer's inbox instantly.

Manage your virtual address and virtual mailbox from anywhere. Clients can view & manage their postal mail and mailing address using a computer, tablet or smartphone. Create a Business or Personal account.

Take back control of your email with this easy-to-deploy mail server in a box.

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

Online Certified Mail allows you to send certified mail and certified letters in just minutes.

Sign up for a virtual digital mailbox and get your postal mail online. View and manage your snail mail from your computer or from any mobile device.

Reliable, secure, extensible, and customizable mail server software platform made for on-prem and cloud-native deployment; easily scalable, smart licensing.

Amazingmail is your direct mail marketing and web to print solution to expand your customer base and increase revenues. Find out if Amazingmail can help you!

Ensure communication with customers and suppliers, modernize messaging infrastructures and automate manual business processes thanks to Retarus’ intelligent cloud solutions.

GrowMail's direct mail software is used by over 60,000 marketers to design, print, target, and send mail marketing campaigns.

Send PDF as USPS Certified mail and First Class Mail from your computer; Send from our API.

Save on infrastructure and maintenance costs. Choose your data centre (US, EU, APAC). AWS native cloud email hosting.

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

Abstract provides powerful APIs to help you enrich any user experience or automate any workflow. Used by 10,000+ developers worldwide.

The #1-rated online postal mailing solution. Easily mail letters, postcards and more online from $0.85. Start sending mail in minutes with our HIPAA-compliant print & mail service.

The leading handwritten notes service. Find & retain customers with handwritten mail, letters & postcards, that are personalized, automated & measurable.

Email Delivery Platform to test, send and control email infrastructure in one place. Great for dev teams. Start today - Sign Up free!

Host your professional email on a secure, privacy-guaranteed, and ad-free email hosting service built-in with features like email marketing services can do.

Fast, private email hosting for you or your business. More productive, lightning fast, simple and built to save you time.

Easy to Install and manage, carrier class Mail Server Software with modern fast WebMail interface, spam protection and much more.

LettrLabs creates Handwritten Letters that get Opened and Responded to more than other marketing mediums, with Prices that are 1/2 the Competition!

DocuSend is a web-based document print and mail solution that takes addressed PDF documents. Online Document Mailing Service. Rochester, New York.

Click2Mail's easy to use integrated direct mail tools enable businesses of all sizes to send marketing mail, business mail, personal mail, invoices, postcards and more!

Send your Transactional and marketing Emails safely, track your results and use powerful APIs designed for devolopers by developers. Try for free

Mailbox Forwarding scans your mail for you to view online. Our remote mailbox rental service allows you to manage, scan, and forward all of your postal mail online. PO box and mail forwarding virtual office services.

SMTP email relay service that is powerful, secured and reliable. Send better transactional emails and integrate easily with our email API.

Everything you need for more successful email delivery and performance management, from simple sending tools to deeply informative reporting.

Handwritten Direct Mail Automation Platform. Send postcards, notecards and letters right from your computer.

Build the ideal data file import experience with Flatfile and turn csv, xls, xlsx, pdf and more into API-ready data. See how it works or start for free now.

Over 31,000 companies from 20 countries worldwide are already using KIRIM.EMAIL as their email infrastructure to generate more sales, build apps, and build

UniOne is a transactional email service: you can send Transactional Emails simple and cheap with the help of platform API Email UniOne.

Start sending emails with our top-rated service. Sign up for free now to streamline your email sending process with API or SMTP.

Start sending transactional and marketing email in minutes. Easily scale to enterprise-volume with Twilio SendGrid’s Email API. Try it free!

Send bulk, transactional, & marketing emails with our easy-to-use and reliable SMTP. Check the quality of email and improve delivery. Get started for free!

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

JangoSMTP - Transactional Emails Made Easy. Highest Inbox Results. Live US-Based Support. API and SMTP Relay Sending.

Choose from our extensive global network of office space, coworking, virtual office locations and meeting rooms around the world. Get a quote today.

The award-winning Docusign API platform is reliable, scalable & secure. Explore the eSignature API, Notary API, Click API, Rooms API & more!

Smartsheet enables teams to manage projects, automate processes & scale programs in one powerful platform. Maintain visibility & keep distributed teams connected.

Fast, secure, and sustainable email services provided by email professionals. Powerful Email and Domain Hosting for businesses and organizations.

Postal is the leading intelligent gifting platform that helps thousands of businesses increase their pipeline, retain customers, and reward employees. The platform and its global marketplace enable customers to automate direct mail, manage branded company swag, and send personalized gifts, all while centralizing cost and reducing waste.

CapLinked provides secure VDR solutions for online document sharing & management. Experience enterprise-grade security & unparalleled support today.

Integrate email, calendar, contacts & tasks painlessly with Aurinko. Free trial, trusted by leading companies.

Niezawodne Email API i SMTP w chmurze. Najwyższa dostarczalność i szczegółowa analityka wiadomości email wysyłanych z Twojego systemu lub aplikacji.

Enterprise-strength tool for automating both mass-mailing and single email processing jobs.

Notifii is the leading package tracking software and communication platform for apartments, student housing & corporate buildings. Package logging done in seconds, instant notifications, and keep all of your community's notifications in one place with Notifii.

Orderbot helps enterprise organizations automates receiving orders from multiple online channels and storefronts, offers real-time inventory levels and insights, removes the complexity from product management, and automatically routes B2C and B2B orders to ensure on time delivery. Built for enterprise and SMB's alike. Ensure the right order is delivered on time, every time.

Engage consumers at home with timely, relevant marketing mail that’s automated, performance-driven, and measurable across all points of sale.

This reliable and secure transactional email service by Zoho Mail ensures guaranteed and fast delivery of transactional emails, and comes with a pay-as-you-go pricing plan.

Courier is a notification API built for developers. Design once, and deliver to any channel – email, Slack, SMS, push, and more – all through a single API.

Put your trust in the VDR solution used by small businesses and enterprises alike to manage your most complex, confidential deals.

Simple Interact is a deeply-integrated highly-customizable digital front door and patient engagement platform that caters to Physician groups, Health Centers, and Hospitals. We help these healthcare facilities run more efficiently and profitably by reducing the burden on staff while also improving patient experience, satisfaction, and online reputation.

Abowire is an expert-driven solution to automate and scale your recurring revenue & accelerate your growth. Fast-track your path to subscription success with expert customization and support.

Secure Windows or Linux mail server that includes chat, calendaring and contacts and offers a cost-effective alternative to Microsoft Exchange.

Nevatech Sentinet offers a flexible, lightweight and scalable API Management platform to help businesses maximize the value of their data. Try Nevatech Now!

Design your own White Label Client / Customer Portal access w/ Secure Login : Fully branded Dashboard & Email Notifications

Turn Direct Mail into a data-driven performance marketing channel. Digital capabilities in ad platforms are available for Direct Mail.

Explore AuthMailer transactional email service! Discover its features, pros, and cons to send transactional emails.

Stop bots and manual spam from reaching you or your customer. All with high accuracy and privacy.

Zimbra: A Cloud-Hosted Collaboration Software and Email Platform That Integrates With Proprietary Business Solutions

Design & create custom certificates or diplomas online. Use an existing certificate template or design your own, then email it. It's really that easy!

Digitalisieren Sie Ihren Posteingang und automatisieren Sie Ihre Prozesse mit Caya ▶️ Geschäftlich und Privat ▶️ Beste Bewertung auf OMR Reviews

Email delivery, perfected with Mailtinni! 💌 Your new SMTP service: fast, reliable, highly secure. 🚀

Unlock the power of your communications data. The Nylas communication APIs remove complexity & empower teams to create seamless user experiences.

Thousands of Marketers Have Increased Engagement and ROI with PFL’s Direct Mail Automation Platform. Make Every Connection Count with PFL Direct Mail Solutions

Most trusted email signature management solution for medium & large enterprises. Automate and manage signatures with Crossware's email signature solution.

Fasttony: Twoje rozwiązanie do automatyzacji marketingu na Facebooku. Odkryj łatwe w użyciu narzędzia, które zwiększą Twoją obecność online, oszczędzą czas i poprawią efektywność kampanii. Zobacz wiecej!

The Only AI Enabled Real Estate Wholesaling Software to Scale Wholesaling & Flipping | Leads, Comps, ARV, Websites, CRM, SMS, RVM, Email Marketing, Rehab Estimator in One Platform

EasyPost's best-in-class Shipping APIs provide end-to-end flexibility and more control over parcel shipping and logistics processes for anyone shipping online.

From signing to filing, it's never been easier or more affordable to engage customers with API toolkits from the leader in online legal services.

Enterprise Communications Platform as a Service (CPaaS)

Empower your brand with centralized email compliance management. Maximize revenue through compliant outbound marketing.

Leading mail server and webmail client, XGenPlus offering fast, secure, and reliable emailing services supporting linguistic domains - World's first enterprise email solution.

The **SuperReceipt** API provides structured data from sales receipts printed on Star-Micronics thermal receipt printers. Only integrate this very simple API to obtain receipt data from virtually any POS! ## How does it work? Star-Micronics receipt printers upload an image of each printed sales receipt to the Star Cloud. When a retailer enables the 'Sophatar Data Access' service in the Star marketplace at http://www.starmicronicscloud.com, then Sophatar can access these images. We run optical character recognition (OCR) and parsing on your receipts and store the receipt data that you can query via this API. ## More info? Contact us at [email protected]

Customized logistics management software offered by AllRide Apps. Automate logistics, transport, and delivery operations of your business for optimal growth

Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy law.

Save time, money, and frustration! Automate your document and email management with NetDocuments’ secure, compliant, and “anywhere accessible” platform.

Elastic Email is a marketing platform, built on the most cost-effective delivery engine. Join tens of thousands of companies, which already send their emails!

Simple pay as you go API for meeting bots. Bridge the gap between meetings and LLMs by running your own meeting bots at scale. Get the transcript, video recording, meeting meta-data and more in less than 2 minutes.

From small time lenders to financial institutions, our secure loan management software will help you automate processes across the entire loan lifecycle

Cost-effective, secure hosted email: mailboxes, calendar and address book

Integrate seamlessly with Netcore's Email API for scalability, high deliverability, & real-time analytics. Designed for developers.

Unlock the full potential of your data with our enterprise data integration platform. Streamline data management and access to insights.

A modern API for W-9 collection, TIN verifications, 1099 filings, corrections, and more for federal and state-level compliance.

PDF.co Web API for extracting, editing, converting, merging, and splitting PDF documents. Save time with our powerful tools.

Forget searching through junk, spam, and unsolicited emails to find what you actually need. Bulletproof turns your open-access inbox into a permission-based one.

BELxpress Email Hosting Solution