We build and maintain online platforms. Since 1998.

JJ Internet Projects runs a portfolio of eleven platforms in three areas: subscriptions, invitations and knowledge.

Founder Jaap Groenendijk sets the course, and a small, permanent team of freelancers builds and maintains the platforms. We use the latest technology and AI to deliver more quality and value at the lowest possible cost.

§1 Index

11 platforms

01abonnement.nlCompare newspaper and magazine subscriptionsSubscriptionsLive 02proefabonnement.nlTry a magazine at an introductory priceSubscriptionsLive 03abonnement.beFlemish newspapers and magazinesSubscriptionsLive 04eventinfo.proDigital invitations with a web page, email and social imagesInvitationsLive 05rouwkaarten.onlineDigital funeral cards with a condolence pageInvitationsLive 06trouwkaarten.onlineDigital wedding invitationsInvitationsLive 07geboortekaarten.onlineDigital birth announcementsInvitationsLive 08uitnodigingen.onlineInvitations for parties and birthdaysInvitationsLive 09freesavethedate.onlineFree save the dates with add to calendar and RSVPInvitationsNew 10thuisstudie.nlCompare home study and online coursesKnowledgeBeing rebuilt 11annreports.comInternational archive of annual reportsKnowledgeArchive

§2 Now

October 2026

Eventinfo.pro: Pro and Free

Eventinfo.pro is growing into a family of invitation services. The paid invitations of Eventinfo.pro are the Pro side: a dedicated web page, email, social images and all guest replies in one overview. Since October, freesavethedate.online has been the free version. There you create a save the date with an add to calendar button and early RSVP, as a first step towards a full invitation. At the same time we are expanding internationally, with more languages, more designs and card sites that share one style and structure.

Further optimisation of the subscription sites

On abonnement.nl, abonnement.be and proefabonnement.nl we are improving how well we rank for categories such as children's magazines and fishing magazines. Title pages get up-to-date copy that we write and check with AI, and we are adding content about gift subscriptions and the best magazines per category. We use Google Ads sparingly and selectively. A monthly report shows where we can improve.

A new set-up for Thuisstudie.nl

Thuisstudie.nl is getting a new set-up. The aim is a modern, clear comparison site for home study and online courses, with better information per course and a blog that helps visitors choose. The new site is also the basis for further growth, with a broader, international course comparison site as the long-term goal.

§3 Profile

1998Launch of jaarverslag.com, one of the first Dutch websites in its field.

1999Launch of the affiliate platform Testnet.nl.

2010Sale of the affiliate platform. JJ Internet Projects continues with its own platforms.

2026Eventinfo.pro, the card sites and freesavethedate.online go live.

With abonnement.nl, abonnement.be and proefabonnement.nl as the foundation, the portfolio has grown to eleven platforms. Each platform has a permanent developer, and routine work runs on fixed workflows and AI.