sendgrid.com
Mixed
Results vary across sendgrid.com: of 6 URLs tested, 1 is disrupted some of the time, 3 load normally and 2 have no conclusive recent result. 189 tests have been run under this domain since 2012-05-21, the most recent on 2026-05-22.
The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
The site itself
http://sendgrid.comas of 2026Intermittenthttps://sendgrid.comas of 2026Not blockedPages and subdomains (4)
https://app.sendgrid.comas of 2026Not blockedhttps://api.sendgrid.comas of 2025Not blockedhttp://api.sendgrid.com/v3Not enough datahttp://clicktrack.sendgrid.com/wf/click?upn=pGG1htJXujGRSj2H69rnZVTkq-2BoZw6mwKpDRo03n-2B5FXI-2BOGlFmPGAZN-2B34DJ8LW4WSYbLb-2F58wcTxnsHGTOkQ6INXleoRv8FH-2FVidsejA-2BRpgSwYwDk5ogb-2B4Bi9zXC_XWuFLyIV9I6Ms2ROv651AKSVuwoSHrGIbICiOivP5avGhVAdsg3DYWXaJmE95N7jwFUnresolvableAbout sendgrid.com and the Great Firewall
Results vary across sendgrid.com: of 6 URLs tested, 1 is disrupted some of the time, 3 load normally and 2 have no conclusive recent result. 189 tests have been run under this domain since 2012-05-21, the most recent on 2026-05-22.
Plain HTTP and HTTPS differ here: http://sendgrid.com is intermittent, https://sendgrid.com is not blocked. The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
Elsewhere on the site
Most-blocked .com domainsEvery tested URL under sendgrid.com
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.