A webhook is an HTTP callback-based real-time event notification mechanism that lets a service push data to a designated URL when an event occurs, a core technology for real-time data sync and workflow automation.
⚡ Automation
Compare 306 automation tools covering CI/CD, monitoring, workflow automation, email marketing, RPA and developer tools.
Apache Airflow, born at Airbnb in 2015, is an Apache top-level open-source workflow orchestration platform that defines data pipelines with Python DAGs for large-scale task scheduling and ETL.
Statuspage, founded in 2013 and part of Atlassian, is a leading status page service trusted by 20,000+ teams. It helps companies communicate service status, planned maintenance, and incident updates to users in real time, a standard tool for modern SRE teams.
Fluentd, initiated in 2011 and donated to the CNCF in 2016 (graduated 2019), is an open-source log collector serving as a unified logging layer with 500+ plugins and multi-output routing, a mainstream log collection solution for Kubernetes.
Kibana, released by Elastic in 2012, is a data visualization platform that presents Elasticsearch data through a browser interface, supporting dashboards, Lens drag-and-drop charting, and alerting as the visualization frontend of the ELK Stack.
Logstash is Elastic's server-side data processing pipeline, first created by Jordan Sissel in 2009, using an input-filter-output model and 200+ plugins to centrally clean multi-source data and forward it to Elasticsearch, Kafka, S3, and more.
Alibaba Enterprise Email, from Alibaba Cloud (founded 2009), integrates natively with DingTalk. Built on Alibaba Cloud's global infrastructure, offering custom domain email, office suite, and cloud management.
Amazon SES is AWS's email sending service, launched in 2011. It offers SMTP and API sending, 62,000 free emails/month from EC2, and $0.10/1,000 emails beyond — the most cost-effective choice for transactional and bulk email scenarios.
Mailchimp was founded in 2001 and is headquartered in Atlanta, USA, serving 14M+ users as an email marketing and marketing automation platform. It integrates email marketing, customer journey automation, and CRM, now operating under Intuit.
Mailgun was founded in 2010 and is headquartered in San Antonio, USA, as a developer-focused email sending API platform. Flexible routing, email validation, and real-time logs help businesses build reliable transactional email, with 50,000 free emails per month.
NetEase Enterprise Email, operated by NetEase (founded 1997), powers over 500 million users via its 163 Mail platform. Offers custom domain business email, anti-spam, and office suite services.
Twilio SendGrid was founded in 2009 and is headquartered in Denver, USA, as an email sending API and marketing platform processing 80B+ emails daily. REST API and SMTP integration serve startups to Fortune 500 companies.
Zoho Mail was founded in 2008 and is headquartered in Chennai, India. It is one of the most cost-effective business email services, offering a free plan with 5 users/5GB storage, paid plans from $1/user/month, and a clean ad-free interface with deep Zoho ecosystem integration.
AWeber, founded in 1998 and headquartered in Chalfont, Pennsylvania, is an email marketing service for SMBs serving 100K+ business customers. It is known for 700+ email templates, high deliverability, and excellent customer support, with a free plan of 500 subscribers.
Brevo (formerly Sendinblue), founded in 2012 and headquartered in Paris, France, is an omnichannel marketing platform unifying email, SMS, WhatsApp, live chat, and CRM. It serves 500K+ business customers, with a free plan of 300 emails per day and unlimited contacts.
Campaign Monitor was founded in 2005 and is headquartered in Sydney, Australia, as an email marketing and marketing automation platform. Drag-and-drop editing, visual customer journeys, and a transactional email API help brands run effective email marketing.
Constant Contact, founded in 1995 and headquartered in Waltham, Massachusetts, is a legacy email marketing platform for small businesses and nonprofits, serving 600,000+ customers.
ConvertKit (rebranded as Kit in 2024), founded in 2013 and headquartered in Boise, Idaho, is an email marketing platform built for content creators, serving 500K+ creators. It is known for tag-based subscriber management, visual automation workflows, and digital product delivery across blogging, YouTube, podcasting, and online education.
Customer.io was founded in 2012 and is headquartered in Portland, USA, as a behavioral email and message automation platform. An event-driven engine, visual customer journeys, and multi-channel reach help product and marketing teams send personalized messages in real time based on real user behavior.
Drip was founded in 2012 and is headquartered in Chicago, USA, as an ecommerce CRM and email automation platform built for online retailers. Deep ecommerce data integration, behavioral trigger workflows, and a dynamic segmentation engine help brands automate their full customer lifecycle.
EmailOctopus, founded in 2015 in London, UK, specializes in ultra-low-cost email marketing powered by Amazon SES. Its free plan supports 2,500 subscribers at roughly 10x lower cost than Mailchimp.
GetResponse, founded in 1998 and headquartered in Gdansk, Poland, is an all-in-one marketing platform combining email marketing, marketing automation, webinars, and landing pages, serving 350K+ business customers. Built-in webinars and full-funnel coverage are its key differentiators.
MailerLite was founded in 2006 and is headquartered in Lithuania, serving 700K+ users as an email marketing and automation platform. With 1,000 contacts free and paid plans from $9/month, its visual automation workflows make it a high-value choice for SMBs and creators.
MailerSend, founded in 2019 and headquartered in the United Kingdom, is a developer-focused email API and SMTP relay platform with a free tier of 12,000 emails per month, ideal for transactional and notification emails.