--- title: "TYPO3 Core Experts & Extensions | b13" url: "https://b13.com/typo3-expertise/expertise" description: We don’t just use TYPO3—we help build it. See how b13’s core contributors, extensions, and products shape the platform your website runs on. date: 2026-08-11 modified: 2026-08-21 lastUpdated: 2026-08-27 --- # TYPO3 Core Experts & Extensions | b13 The Experts That Shape TYPO3 Core =================================== We build what matches your needs—not what’s trendy. As TYPO3 Platinum Members with over 20 years of experience, we’ve been the leading contributors to TYPO3 core since 2015. Whether your project calls for a new TYPO3 extension or a core customization, we’re here to turn even the most ambitious ideas into reality. [ Test our expertise ](https://b13.com/lets-connect) ![A laptop with a purple screen is surrounded by three rockets, each launching upward with flames. The design is colorful and stylized, emphasizing a theme of technology and innovation.](https://b13.com/fileadmin/_processed_/7/d/csm_Solition_T3faster_Freigestellt_f948e2340f.webp) Our Expertise Empowers Your Team ---------------------------------- We Ensure TYPO3 Makes Sense to You Asking questions and digging to the root of the issue is important to us. With a “nothing’s impossible” mindset, we build solutions that fit your exact needs, are easy to work with, and last long beyond our collaboration. ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Markenkonsistenz_80px.svg) **We Add What Core Is Missing** When your project needs something TYPO3 core doesn’t cover yet, our seat on the TYPO3 Core Team lets us judge whether a new feature belongs in core—and build it there. Core features get maintained by TYPO3’s own core developers, with official bugfix and long-term support included. When bugs get in the way of your deadline, our in-house core contributors fix them on your timeline, not the community’s. ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Extension_Framework_80px.svg) **We Extend What’s Already There** If TYPO3 covers most of what you need but not all of it, we build a closely integrated extension instead of touching core—and if the addition helps more than just you, we submit it back for consideration in TYPO3 core. ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Neues_Design_80px.svg) **We Build Exactly What You Need** For requirements unique to your project, we build custom extensions—as lean as possible, using as much of TYPO3 core as we can, so you get low maintenance costs and a strong return on investment. > Our IT department recommended b13 because they have TYPO3 Core developers on their team. Jens Kelch, Villeroy & Boch [ Read success story ](https://b13.com/services/success-stories/uniting-creativity-with-consistency-villeroy-boch-professional-portal) What We Stand For ------------------- ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Platinum_Member_TYPO3_80px.svg) As a TYPO3 Platinum Member, we actively support and help shape the development of TYPO3 at the highest level. We’re not just a user of TYPO3—we’re a company that invests in, contributes to, and helps drive the future of the platform. Our CTO Benni Mack was the Core Lead for many years. ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Zertifizierungen_80px.svg) With multiple TYPO3 CMS core contributors on staff, and most other team members holding at least one official TYPO3 certification, b13 will understand your needs and be able to build a solution from the ground up. ![](https://b13.com/fileadmin/Illustrations/Icons/List-Illu-Partner_teamwork_80px.svg) 50 active clients choose to keep working with us beyond the completion of their project, since they appreciate a partner who they relate to and who is quick to respond if any fires need putting out. 100 Extensions vouch for our dedication. b13 in Numbers ---------------- ### 100 Own Extensions All built and maintained in-house, ready to solve real problems. [ Explore extensions ](https://b13.com/useful-typo3-extensions-from-b13-to-you) ### 50 Active Clients 50 clients trust us with their websites right now, not just in the past. [ Hear from our clients ](https://b13.com/services/success-stories) ### 24 Creatives & Coders 24 specialists, one team, working side by side from different parts of Germany. [ Get to know us ](https://b13.com/about-us/our-team) ### 20 Years of Experience Two decades of hands-on TYPO3 work, a foundation you can trust. [ Our Knowledge Base ](https://b13.com/knowledge) ### Clients in 12 Countries We support clients in 12 countries, from Germany to the United States. [ Hear from our clients ](https://b13.com/services/success-stories) ### 2 Core Contributors We’re co-developing and designing new versions of the platform we build on. [ Meet our Team Core ](https://b13.com/about-us/our-team/team-core) Our Extensions ---------------- - ![](https://b13.com/fileadmin/Extensions/Official_Icons/Ext_AI_Tag_Icon_2026-07-21.svg) ### Ai Label Make AI content transparent in TYPO3. [ More about AI Label ](https://b13.com/useful-typo3-extensions-from-b13-to-you/ai-label) - ![](https://b13.com/fileadmin/Extensions/Official_Icons/ext-Ai-Settings.svg) ### AiM Add a central AI layer to TYPO3 with one flexible extension. [ More about AiM ](https://b13.com/useful-typo3-extensions-from-b13-to-you/aim) - ![](https://b13.com/fileadmin/Extensions/Official_Icons/ext-Container.svg) ### Container Add flexible in-page structures with a simple extension—the core way. [ More about Container ](https://b13.com/useful-typo3-extensions-from-b13-to-you/container) - ![](https://b13.com/fileadmin/Extensions/Official_Icons/ext-Menus.svg) ### Menus A TYPO3 Extension for creating fast menus - in a fast way [ Find on GitHub ](https://github.com/b13/menus) [ All Extensions ](https://b13.com/useful-typo3-extensions-from-b13-to-you) Our Products -------------- Packages to Solve Targeted Issues - ![](https://b13.com/fileadmin/_processed_/f/a/csm_Descr._Images_01_ac1a113d19.webp) ### Descriptive Images [ More: Descriptive Images ](https://b13.com/products/descriptive-images-for-typo3) - ![](https://b13.com/fileadmin/_processed_/4/5/csm_ManEd_02_67b6eae114.webp) ### Managing Editor [ More: Managing Editor ](https://b13.com/products/managing-editor-for-typo3) - ![](https://b13.com/fileadmin/_processed_/4/0/csm_SSO_icon_fc5106b858.webp) ### Single-Sign-On [ More: Single-Sign-On ](https://b13.com/products/single-sign-on) - ![](https://b13.com/fileadmin/_processed_/6/7/csm_Href__2__e37c5c57e5.webp) ### Reminders [ More: Reminders ](https://b13.com/products/reminders-for-typo3) - ![](https://b13.com/fileadmin/_processed_/1/b/csm_Href_ac597f6760.webp) ### Hreflang Multisite Module [ More: Hreflang Multisite Module ](https://b13.com/products/hreflang-multisite-module-for-typo3) ![](https://b13.com/fileadmin/_processed_/b/8/csm_florian_38f1220858.webp)### [ Florian “Flix” Keitgen ](https://b13.com/team/florian-keitgen) Head of Product Development ### We’ll Build, Extend, or Fix It Right! At b13, we emphasize deep in-house expertise in our core technologies. Our clients are our partners in the ongoing, evolving process of creating and maintaining the best digital solutions for their goals and needs. Contact us to learn how TYPO3 core development can bring your business undiscovered benefits. [ Let’s Connect ](https://b13.com/lets-connect) The Experts ------------- Every project brings our experts from across disciplines together. We don’t work for you—we work with you, to build solutions that perform today and scale tomorrow. [ Meet the team ](https://b13.com/about-us/our-team) [ How we work ](https://b13.com/services/how-we-work) > To have a direct line to an agency where the CTO is a TYPO3 Core Developer was very impressive. David Herber, Senior Developer at BRAND [ Read full success story ](https://b13.com/services/success-stories/brand-brings-typo3-expertise-in-house) ![A group of people seated in a meeting room, attentively listening to a speaker at the front, with a presentation displayed on a screen.](https://b13.com/fileadmin/_processed_/c/e/csm_b13-weiterflug-2026-017_9ef7cc6c33.webp) ![](https://b13.com/_assets/274d3377160d4aa2cf66c0051093e3bc/Images/icon-cloud-2026.svg?1788777645) ![A diverse group of people gathered outdoors, engaging in conversation and laughter, with a building and trees in the background.](https://b13.com/fileadmin/_processed_/8/6/csm_b13-weiterflug-2026-009_f1309fd618.webp) ![](https://b13.com/_assets/274d3377160d4aa2cf66c0051093e3bc/Images/icon-cloud-2026.svg?1788777645) ![](https://b13.com/fileadmin/_processed_/f/8/csm_20260521-910A2601-HDR_76b7123cf7.webp) ![A woman in a pink shirt stands while holding a yellow note, presenting in front of a screen with text in German about customer responsibility and communication.](https://b13.com/fileadmin/_processed_/c/1/csm_b13-weiterflug-2026-035_d9b412adbe.webp) Knowledge Base ---------------- Our Wisdom. Your Win. For over 20 years, we’ve gained valuable experience through client projects. Sharing this knowledge is a central part of our commitment to open source. Dive into our complete library of expert content: [ Expand your knowledge ](https://b13.com/knowledge) - ![A purple graphic featuring a smartphone icon with three horizontal bars, surrounded by illustrations of vintage telephones.](https://b13.com/fileadmin/_processed_/2/5/csm_EXTphonenumber_Headerbild_93d5de1696.webp) ### Clean Phone Numbers in TYPO3: Why We Built EXT:phone\_number 11 August 2026 | David Steeb TYPO3 stores phone numbers as tel: links, but doesn’t format them for output. Meet EXT:phone\_number, a Fluid ViewHelper for clean, consistent numbers. [ Read more: Clean Phone Numbers in TYPO3: Why We Built EXT:phone\_number ](https://b13.com/knowledge/clean-phone-numbers-in-typo3) - ![Cartoon trophy character surrounded by hands giving thumbs up and a heart gesture, set against a gear-patterned background.](https://b13.com/fileadmin/_processed_/f/7/csm_T3ppy_Design_Kit_Headerbild_b51eb9dc31.webp) ### T3ppy Gives TYPO3 a Friendly Face 06 August 2026 | Florian “Flix” Keitgen TYPO3 is powerful—but it doesn’t have to feel impersonal. Meet T3ppy, our friendly companion for the backend. [ Read more: T3ppy Gives TYPO3 a Friendly Face ](https://b13.com/knowledge/t3ppy-design-kit) - ![Gavel labeled "AI" on a circuit-patterned background with yellow stars, symbolizing regulation or legislation related to artificial intelligence in the EU.](https://b13.com/fileadmin/_processed_/1/0/csm_EUAIAct_Headerbild_510724b3de.webp) ### AI Content in TYPO3: Labelling Needs Accountability 02 August 2026 | Benni Mack The EU AI Act brings the origins of AI-generated content into focus. AI Label marks AI-generated and AI-edited content in TYPO3 and records who signed off the published version—for… [ Read more: AI Content in TYPO3: Labelling Needs Accountability ](https://b13.com/knowledge/ai-content-in-typo3-labelling-needs-accountability)