Best Online Fax Services for Microsoft Outlook

ClickSend: A simple, battle-tested SMS API built for developers. Ship messaging features in minutes with a clean API, reliable infrastructure and zero lock-ins. Why devs and sysadmins trust us: - Direct carrier routes to 190+ countries — no middleman - 99.95%+ uptime, low latency, high throughput - Billions of messages delivered globally - Pay-as-you-go pricing — no contracts - 24/7 support from people who actually understand APIs Works the way you code: Integrate via REST API, use pre-built SDKs (PHP, Python, Ruby, Node.js, C#), or trigger via webhooks. Already using Zapier, Make, or Power Automate? We've got you covered with pre-built integrations ready to go. It works straight out of the box — and keeps working when you scale from 100 to 100 million messages. No lock-ins. No fuss. Just reliable SMS infrastructure you can trust. Perfect for: 2FA, alerts, monitoring notifications, transactional messaging, user onboarding flows and anything else that needs to reach people fast.

We are excited to share that Signeasy has officially joined the Recommended for Google Workspace apps, a prestigious selection of top-tier third-party tools designed to enhance collaboration and productivity for Google Workspace users. By checking for the Recommended for Google Workspace label, customers can identify which applications provide enhanced security, reliability, and seamless integration with Google Workspace services. For developers seeking to embed eSignature functionality into their existing workflows, the Signeasy API offers an intuitive solution. This API allows for the effortless creation of tailored eSignature workflows directly within your website or application. Furthermore, Signeasy boasts robust integrations with widely-used business and productivity platforms such as Salesforce, Google Workspace, Microsoft Teams, and Outlook, empowering developers to create comprehensive document workflows. With Signeasy’s extensive array of API endpoints, users gain full command over the eSignature process for their documents, ensuring a streamlined and efficient experience. This integration not only simplifies the signing process but also enhances overall operational efficiency across various business functions.

FaxSIPit offers a cloud-based faxing solution tailored for medium-sized and large organizations that rely on fax for essential, regulated operations while requiring enhanced security, oversight, and dependability beyond what conventional systems can offer. The platform is designed to facilitate secure faxing in sectors such as healthcare, legal, higher education, finance, and other industries subject to compliance standards, also featuring built-in global faxing capabilities. Users of FaxSIPit can send and receive faxes via various channels, including web browsers, email, desktop applications, APIs, UCaaS platforms like Microsoft Teams and Zoom, as well as mobile devices. Organizations have the option to implement FaxSIPit as a comprehensive cloud solution or within hybrid setups that utilize ATA devices along with existing fax infrastructures, ensuring seamless integration with their current systems and workflows. By adhering to SOC 2 protocols and providing rapid onboarding, FaxSIPit guarantees reliable online faxing for critical business communications, boasting high delivery success rates, an impressive 99.99% uptime, and dedicated onshore support. This comprehensive approach not only enhances operational efficiency but also instills confidence in users that their sensitive information is handled with the utmost care and security.

InterFAX offers scalable, cloud-based, HIPAA- and PCI-DSS-compliant fax solutions to businesses of all sizes. This service is great for remote workers and multi-office workers. Users can securely access the Control Panel via any internet-enabled device. Comprehensive audit trails, automatic deletion of faxes upon delivery, enterprise user administration, and an integrated faxing platform/API that allows for automatic fax removal are some of the features. On request, a Business Associate Agreement (BAA), is available.

OpenText Core Fax modernizes fax communication by moving everything to a secure, cloud-native platform that requires no telephony hardware or analog lines. It streamlines document handling by letting users fax directly from email, mobile devices, desktop applications, or enterprise systems. Designed for industries where privacy and compliance are fundamental, it meets global regulatory obligations while safeguarding sensitive information end-to-end. With extremely high uptime and built-in redundancy, organizations gain reliability without managing infrastructure themselves. Core Fax integrates smoothly with healthcare EHR systems, office communication platforms, and multifunction printers to unify document workflows. Its global data residency options help organizations maintain sovereignty and meet jurisdiction-specific requirements. Teams benefit from improved productivity, easier access to fax capabilities, and reduced administrative overhead. All of this creates a modern, flexible faxing experience that supports both day-to-day tasks and large-scale operational needs.