# F5 BIG-IP, release history and use on real websites. A hardware and virtual load balancer and application firewall from F5. Banks, telecoms and large companies deploy it in front of their servers. - **Status:** Stable. Actively developed. - **Category:** [Servers & Hosting](https://be1st.ai/technologies/server) - **License:** Proprietary - **Latest version:** 21.1.0 (5 May 2026) - **Official website:** https://www.f5.com/products/big-ip - **Documentation:** https://techdocs.f5.com - **Page:** https://be1st.ai/technologies/server/f5-big-ip ## F5 BIG-IP on audited websites 13 of the 16,845 websites audited by be1st run F5 BIG-IP (<1%). That ranks it #29 of the 34 technologies in Servers & Hosting we have seen in audits. ### Most used in Servers & Hosting 1. [Cloudflare](https://be1st.ai/technologies/server/cloudflare): 22% (3,772) 2. [Vercel](https://be1st.ai/technologies/server/vercel): 22% (3,635) 3. [Google CDN](https://be1st.ai/technologies/server/google-cdn): 16% (2,700) 4. [nginx](https://be1st.ai/technologies/server/nginx): 14% (2,284) 5. [OpenResty](https://be1st.ai/technologies/server/openresty): 10% (1,707) 6. [Apache HTTP Server](https://be1st.ai/technologies/server/apache-http-server): 9.3% (1,574) 7. [jsDelivr](https://be1st.ai/technologies/server/jsdelivr): 7.2% (1,221) 8. [cdnjs](https://be1st.ai/technologies/server/cdnjs): 6.0% (1,019) 9. [Netlify](https://be1st.ai/technologies/server/netlify): 5.8% (971) 10. [AWS CloudFront](https://be1st.ai/technologies/server/aws-cloudfront): 5.1% (859) ## F5 BIG-IP versions and release history 31 release lines since 2004, as listed by endoflife.date. The latest version is 21.1.0, released 5 May 2026. Supported according to endoflife.date: 21.1 (active support until 5 May 2029, security fixes until 5 May 2029), 17.5 (active support until 1 Jan 2029, security fixes until 1 Jan 2029), 17.1 (active support until 31 Mar 2027, security fixes until 31 Mar 2027). | Version | Released | Latest release | Support | | --- | --- | --- | --- | | 21.1 (LTS) | 5 May 2026 | 21.1.0 (5 May 2026) | Supported, active support until 5 May 2029, security fixes until 5 May 2029 | | 21.0 | 6 Nov 2025 | 21.0.0 (6 Nov 2025) | End of life, since 6 Aug 2026 | | 17.5 (LTS) | 27 Feb 2025 | 17.5.1 (26 Jun 2025) | Supported, active support until 1 Jan 2029, security fixes until 1 Jan 2029 | | 17.1 (LTS) | 14 Mar 2023 | 17.1.3 (10 Oct 2025) | Supported, active support until 31 Mar 2027, security fixes until 31 Mar 2027 | | 17.0 | 26 Apr 2022 | 17.0.0 (26 Apr 2022) | End of life, since 31 Jul 2023 | | 16.1 (LTS) | 7 Jul 2021 | 16.1.6 (15 Apr 2025) | End of life, since 31 Jul 2025 | | 16.0 | 16 Jul 2020 | 16.0.1.1 (2 Oct 2021) | End of life, since 7 Oct 2021 | | 15.1 (LTS) | 11 Dec 2019 | 15.1.10 (30 Aug 2023) | End of life, since 31 Dec 2024 | | 15.0 | 23 May 2019 | 15.0.1 (8 Aug 2019) | End of life, since 23 Aug 2020 | | 14.1 | 11 Dec 2018 | 14.1.5 (31 May 2022) | End of life, since 31 Dec 2023 | | 14.0 | 9 Aug 2018 | 14.0.1 (22 Aug 2019) | End of life, since 9 Nov 2019 | | 13.1 | 19 Dec 2017 | 13.1.5 (18 Apr 2022) | End of life, since 31 Dec 2023 | | 13.0 | 22 Feb 2017 | 13.0.1 (27 Mar 2018) | End of life, since 22 May 2019 | | 12.1 | 18 May 2016 | 12.1.6 (6 Apr 2021) | End of life, since 18 May 2022 | | 12.0 | 2 Sep 2015 | 12.0.0 (2 Sep 2015) | End of life, since 2 Dec 2017 | | 11.6 | 25 Aug 2014 | 11.6.5 (22 Aug 2019) | End of life, since 10 May 2022 | | 11.5 | 31 Jan 2014 | 11.5.10 (19 Sep 2019) | End of life, since 8 Apr 2020 | | 11.4 | 11 Jun 2013 | 11.4.1 (17 Sep 2013) | End of life, since 17 Sep 2017 | | 11.3 | 17 Dec 2012 | 11.3.0 (17 Dec 2012) | End of life, since 17 Dec 2015 | | 11.2 | 11 Jun 2012 | 11.2.1 (25 Sep 2012) | End of life, since 31 Dec 2018 | | 11.1 | 28 Nov 2011 | 11.1.0 (28 Nov 2011) | End of life, since 28 Nov 2014 | | 11.0 | 24 Aug 2011 | 11.0.0 (24 Aug 2011) | End of life, since 24 Aug 2014 | | 10.2 | 4 May 2010 | 10.2.4 (11 Apr 2012) | End of life, since 31 Dec 2016 | | 10.1 | 17 Dec 2009 | 10.1.0 (17 Dec 2009) | End of life, since 1 Mar 2016 | | 10.0 | 12 Mar 2009 | 10.0.1 (1 Jun 2009) | End of life, since 31 Aug 2013 | | 9.6 | 20 Dec 2007 | 9.6.1 (17 Apr 2008) | End of life, since 31 Mar 2012 | | 9.4 | 20 Dec 2006 | 9.4.8 (31 Aug 2009) | End of life, since 31 Aug 2013 | | 9.3 | 27 Apr 2006 | 9.3.1 (7 Nov 2007) | End of life, since 31 Mar 2012 | | 9.2 | 29 Sep 2005 | 9.2.5 (22 Jan 2007) | End of life, since 31 Jul 2008 | | 9.1 | 26 Jul 2005 | 9.1.3 (31 Jul 2007) | End of life, since 30 Apr 2009 | | 9.0 | 23 Aug 2004 | 9.0.5 (12 May 2005) | End of life, since 18 May 2007 | Sources: [endoflife.date](https://endoflife.date/big-ip), checked 8 Nov 2026. ## Other technologies in Servers & Hosting - [unpkg](https://be1st.ai/technologies/server/unpkg): 2.8% of websites - [Fastly](https://be1st.ai/technologies/server/fastly): 1.6% of websites - [BunnyCDN](https://be1st.ai/technologies/server/bunnycdn): 1.2% of websites - [Microsoft IIS](https://be1st.ai/technologies/server/microsoft-iis): 1.0% of websites - [LiteSpeed](https://be1st.ai/technologies/server/litespeed): <1% of websites - [Caddy](https://be1st.ai/technologies/server/caddy): <1% of websites - [Amazon S3](https://be1st.ai/technologies/server/amazon-s3): <1% of websites - [Google Cloud](https://be1st.ai/technologies/server/google-cloud): <1% of websites - [Varnish](https://be1st.ai/technologies/server/varnish): <1% of websites - [Azure](https://be1st.ai/technologies/server/azure): <1% of websites - [Hostinger CDN](https://be1st.ai/technologies/server/hostinger-cdn): <1% of websites - [GitHub Pages](https://be1st.ai/technologies/server/github-pages): <1% of websites [All 35 in Servers & Hosting](https://be1st.ai/technologies/server) ## Questions about F5 BIG-IP ### What is F5 BIG-IP? A hardware and virtual load balancer and application firewall from F5. Banks, telecoms and large companies deploy it in front of their servers. The be1st catalog lists F5 BIG-IP under Servers & Hosting. License of F5 BIG-IP: Proprietary. ### What is the latest version of F5 BIG-IP? The latest version of F5 BIG-IP is 21.1.0, released 5 May 2026 (source: endoflife.date). ### Which F5 BIG-IP versions are still supported? According to endoflife.date, these F5 BIG-IP release lines are supported: 21.1 (active support until 5 May 2029, security fixes until 5 May 2029), 17.5 (active support until 1 Jan 2029, security fixes until 1 Jan 2029), 17.1 (active support until 31 Mar 2027, security fixes until 31 Mar 2027). ### How many websites use F5 BIG-IP? 13 of the 16,845 websites audited by be1st run F5 BIG-IP (<1%), as of 8 Nov 2026. ### Is F5 BIG-IP still a modern choice? F5 BIG-IP is a stable, mature choice rather than a new one. Actively developed. Numbers: latest audit of each of 16,845 websites audited by be1st, as of 8 Nov 2026.