--- title: "Best link building agency: our top 10 agencies in France in 2026 - Astrak" url: "https://astrak.agency/en/best-link-building-agency/" lang: "en-US" --- Updated on **15/10/2026** · Agency sites reviewed on 15/10/2026 **What is the best link building agency? On 15 October 2026 we reviewed the sites of about twenty link building agencies and platforms, and selected nine agencies, ranked alongside Astrak.** A link campaign is judged on specific points: where the links come from, how the sites are chosen, what each link costs, how it is tracked, and cases where the campaign moved rankings. That is what we looked for on each agency's site. Astrak is the author of this ranking and places itself first: the criteria are detailed below so you can judge for yourself. The leading trio ## Top 3 link building agencies in 2026 [No. 1AstrakEach link rebilled at the price paid to the publisher, the agency's work billed separately.](#fiche-astrak)[No. 2OnzeA cofounder behind Link Finder, and links bought with no markup, invoices provided.](#fiche-onze)[No. 3SemjuiceThe link specialist of the panel, and the only one to publish its price list link by link.](#fiche-semjuice) ## Link building agencies in France: what each one publishes Instead of a score out of 10, the table shows what you actually find on each agency's site as of 15/10/2026. | Rank | Agency | Positioning | What the agency publishes about link building | Published price | |---|---|---|---|---| | 1 | Astrak | SEO and GEO agency · editorial link building at the publisher's price | Published pricing model, weekly indexing tracking, 3 quantified link building case studies | Links at publisher price + fees | | 2 | Onze | SEO and GEO agency of senior consultants · Link Finder link comparison tool | Link Finder comparison tool (400,000 sites, 30 platforms), links with no markup, Superprof case | Link building audit €975 · daily rate €650 | | 3 | Semjuice | Link building agency backed by two in-house platforms · Gard | Price list per link (€25 to €550 excl. VAT), JuiceFlow index, 2 platforms, white label | €50 to €550 excl. VAT per link · media from €700 excl. VAT | | 4 | Eskimoz | European search acquisition group · Paris | 5-step method, Notorious tool, penalty recovery, Babybio and Franprix cases | 1k - 5k | | 5 | Junto | Acquisition and growth agency · Paris | 6-step method, AI site scoring, data platform, monthly package, Mestiers case | €800 to €2,000/month | | 6 | SEO Monkey | Acquisition agency, SEO first · Lille | Digital PR page, 3-layer link building in its cases (Mursec, Nat & Nin), daily rate listed | Daily rate €500 | | 7 | Uplix | SEO, paid media and data agency · Paris | 6-step method, dedicated link building team, link-driven content, free competitive analysis | Quote on request (free backlink analysis) | | 8 | Résoneo | SEO, GEO and data consulting firm since 2004 · Paris | Link profile audit, partner network, online PR, co-citation for AI | 1k - 5k | | 9 | Keyweo | Multilingual SEO, SEA and GEO agency · Barcelona | Link building page in 6 languages, 4-step method, quote simulator (€2,990 indicative) | 1k - 5k | | 10 | SEO Hackers | SEO agency of senior consultants since 2012 · Paris | Link building page, link profile audit, backlink analysis, Google penalty recovery | 1k - 5k | 1 ## [Astrak](https://astrak.agency/en/link-building-agency/) SEO and GEO agency · editorial link building at the publisher's price ![Astrak Website](https://astrak.agency/wp-content/uploads/2026/10/Astrak-accueil-octobre-2026.jpg)Astrak is a French SEO and GEO agency of 13 people, which manages about €25,000 of link building per month for its clients. Its model is published on its page [Link building agency](https://astrak.agency/en/link-building-agency/) : each link is rebilled at the price paid to the site's publisher, and campaign management (strategy, site selection, anchors, writing, tracking) is billed as separate fees. Purchases go through Linkavista, a link building platform cofounded by Léo Poitevin, Astrak's CEO. Sites are chosen on their real traffic and indexing rather than Trust Flow, and the pace of acquisition follows the brand's awareness. An in-house tool checks every week that the links are live and indexed, and the links stay in place if the client leaves. [Batman Escape](https://astrak.agency/en/batman-escape/), a Paris escape game, went from about 25,000 to more than 50,000 clicks per month between January and October 2025 according to Ahrefs, with a rebalanced link profile, from 750 to more than 2,000 backlinks. [Inter-Car](https://astrak.agency/en/intercar/), a licensed vehicle scrapper, multiplied its organic clicks by 3.2 between February and September 2026 with a dedicated link building budget. #### Strengths - Price of each link visible: link budget and fees separate. - Weekly indexing tracking for each link. - Links left in place at the end of the engagement. - Quantified, dated link building case studies. #### Points to watch - No package or per-link price listed: the budget is set campaign by campaign. - No press relations offer presented on the page. [Book an appointment with Astrak](https://astrak.agency/en/en/contact/#calendrier)2 ## [Onze](https://agenceonze.fr/services/netlinking/) SEO and GEO agency of senior consultants · Link Finder link comparison tool ![Onze website](https://astrak.agency/wp-content/uploads/2026/10/classement-onze.jpg)Onze is an SEO and GEO agency founded in 2024 that only works with senior consultants. Its cofounder Lucio Laria created Link Finder, a link building tool that analyzes more than 400,000 sites and compares the offers of more than 30 platforms in real time. Onze applies no markup on the links it buys: the client pays a fixed management fee and gets a tracking sheet with each link, the linked page, the price paid and the invoices. The agency offers seven options, from buying links directly from publishers to outreach, directories and forums, linkbaiting, links from its private site network, up to building a network for the client. It publishes two cases: Superprof, with more than 600 backlinks to the strategic pages of its top twelve countries, and Sortlist, with more than 300 backlinks across 15 countries. The link building audit is billed at €975. #### Strengths - Links rebilled with no markup, invoices provided. - Comparison tool covering more than 30 platforms, built by a cofounder. - Link building audit with a listed price. #### Points to watch - Superprof case figures differ between the link building page and the case page. - Management fee amount not listed. [See the link building offer](https://agenceonze.fr/services/netlinking/)3 ## [Semjuice](https://www.semjuice.com/p-campagnes-netlinking/) Link building agency backed by two in-house platforms · Gard ![Semjuice website](https://astrak.agency/wp-content/uploads/2026/10/classement-semjuice.jpg)Semjuice has made link building its core specialty since 2018. Its team of 36 relies on two in-house platforms: Semjuice, for links placed in custom-written articles, and NextLevel, for links added to pages that already rank on Google. An algorithm reassesses publisher sites every month (ranking keywords, referring domains, Trust Flow, estimated traffic), ranked by an in-house index, the JuiceFlow. The agency also works as a white label for other agencies. It is the most transparent agency in the panel on prices: €50 to €550 excl. VAT per link depending on the site's JuiceFlow and article length, €25 excl. VAT for a directory, and from €700 excl. VAT for premium media. Links are placed within fifteen days after approval, with a dashboard that tracks traffic, referring domains, rankings and anchors. It highlights testimonials from SEO managers at PrestaShop and M6, but no detailed quantified case. #### Strengths - Prices per link published, from directories to media. - Site catalog reassessed every month. - Link building specialist since 2018. #### Points to watch - No detailed client case, only testimonials. - Links sold on its own platforms. [See the link building offer](https://www.semjuice.com/p-campagnes-netlinking/)4 ## [Eskimoz](https://www.eskimoz.fr/agence-netlinking/) European search acquisition group · Paris ![Eskimoz Website](https://astrak.agency/wp-content/uploads/2026/10/classement-eskimoz.jpg)Eskimoz is a search acquisition group of more than 250 consultants, present in five countries, which claims more than 1,000 clients and works in ten languages. Its link building offer follows five steps: strategy, audit of the link profile and competitors, roadmap (site types, anchors, content), campaign rollout, then management. It covers link buying, publisher partnerships, editorial link building (studies, expert op-eds) and penalty recovery through cleanup and disavow. Its in-house Notorious tool identifies partner sites, estimates the number of links needed and analyzes competitors' links; its link building consultants combine SEO analysis, link acquisition and media relations. Two cases include a link campaign: Babybio, supported since summer 2020, with +340% organic traffic and +95% sales, and Franprix, supported since January 2020, with +700% organic traffic. #### Strengths - In-house tool for selecting partner sites. - Penalty recovery offer. - Multi-country and multilingual capability. #### Points to watch - Undated results, mixing link building, content and technical work. - No published prices. [See the link building offer](https://www.eskimoz.fr/agence-netlinking/)5 ## [Junto](https://junto.fr/services/agence-seo/agence-netlinking) Acquisition and growth agency · Paris ![Junto Website](https://astrak.agency/wp-content/uploads/2026/10/classement-junto.jpg)Junto is an acquisition agency founded in 2016, with more than 80 staff and more than 800 clients. Its link building method combines AI scoring of domains (Trust Flow, authority, topical relevance) with manual validation, in six steps: goals, link profile audit, source selection, targeting of strategic pages, competitor benchmark, then tracking of rankings and Domain Rating. Its data platform compares the client's authority with a portfolio of more than 350 brands. The agency reports +38% qualified traffic on average on targeted pages, three months after activation. Its Mestiers case, a fashion store, combines content and link building: transactional keywords multiplied by five and the number of backlinks doubled in three months. It lists a support package of €800 to €2,000 per month, and also offers links and articles individually. #### Strengths - Monthly budget listed. - Site selection by scoring, then human validation. - Authority tracking in an in-house data platform. #### Points to watch - Two entry prices on the same page (€800 and €1,500 per month). - Only one case detailing link building, undated. [See the link building offer](https://junto.fr/services/agence-seo/agence-netlinking)6 ## [SEO Monkey](https://www.seo-monkey.fr/seo/relation-presse-digitale/) Acquisition agency, SEO first · Lille ![SEO Monkey Website](https://astrak.agency/wp-content/uploads/2026/10/classement-seo-monkey.jpg)SEO Monkey is an acquisition agency founded in Lille in 2020 by Antoine Veyrières, with SEO as its core business, which claims more than 400 companies served. Its link building URL now redirects to its digital PR offer: a PR consultant, paired with an SEO consultant, builds a media roadmap, sends press releases and follow-ups, and tracks the mentions and backlinks obtained in a Looker Studio report. Its case studies detail three-layer link building: thematic private site networks, guest posts and digital PR. For Mursec, a damp treatment specialist supported from 2024, the agency reports SEO traffic multiplied by seven in twelve months, a Google Ads budget cut by 80% and a top 3 ranking on "humidité mur" (damp wall). For the leather goods brand Nat & Nin, a top 3 ranking on "sac à main" (handbag) in twelve months. The daily rate is listed: €500. #### Strengths - Press relations and SEO in the same setup. - Link method detailed in the published cases. - Day rate published. #### Points to watch - Traffic figures differ from one place to another in the Mursec and Nat & Nin cases. - No link building page separate from press relations. [See the digital press relations offer](https://www.seo-monkey.fr/seo/relation-presse-digitale/)7 ## [Uplix](https://www.uplix.fr/agence-seo/netlinking/) SEO, paid media and data agency · Paris ![Uplix website](https://astrak.agency/wp-content/uploads/2026/10/classement-uplix.jpg)Uplix is a Paris agency that combines SEO, advertising and data. It claims more than 200 client brands and won the Grand Prix of the Cas d'Or in the Search and AI category with its Predictive Ranking tool. Its link building page describes a dedicated team of specialists and a six-step method: audit of authority and anchors, strategy (guest posts, press relations, linkbaiting), domain selection, publication schedule, content designed to attract links, then reporting. The agency says it maintains a network of French-language and international sites and media, and builds in-house tools to analyze link profiles at scale. It offers a free competitive backlink analysis, led by its consulting director, to spot the links competitors get. Its published case studies, such as MAAF (+53.7% SEO traffic), do not detail a link campaign. #### Strengths - Team dedicated to link building. - Links earned through content, not only bought. - Free competitive backlink analysis. #### Points to watch - No case study that details a link campaign. - No published prices. [See the link building offer](https://www.uplix.fr/agence-seo/netlinking/)8 ## [Résoneo](https://www.resoneo.com/nos-expertises/seo/) SEO, GEO and data consulting firm since 2004 · Paris ![Résoneo website](https://astrak.agency/wp-content/uploads/2026/10/classement-resoneo.jpg)Résoneo is a consulting firm founded in 2004 by Richard Strul and three other founding partners. It now has more than 90 consultants and nine partners, and is a Premier Partner of Google, Facebook and Microsoft Ads. Its SEO offer includes a link building component: audit of the link profile and of competitors' profiles (unlinked mentions, broken links, toxicity), a network of partner sites, shareable content such as infographics or data visualizations, and linkbaiting operations. The firm also offers online press relations to relay its clients' studies and statements in specialized media, and works on brand co-occurrence and co-citation for visibility in AI engines. One client, Linvosges Hôtellerie, cites link building among the actions that moved its keywords into the top 10 since its site launched in 2022. #### Strengths - Online press relations and linkbaiting. - Co-citation approach for AI engines. - Team of more than 90 consultants. #### Points to watch - No dedicated link building page and no case study with figures. - No published prices, large account budgets. [See the SEO and link building offer](https://www.resoneo.com/nos-expertises/seo/)9 ## [Keyweo](https://www.keyweo.com/fr/seo/services/netlinking/) Multilingual SEO, SEA and GEO agency · Barcelona ![Keyweo website](https://astrak.agency/wp-content/uploads/2026/10/classement-keyweo.jpg)Keyweo is an SEO, SEA and GEO agency launched in Barcelona in 2018 by two French entrepreneurs, Guillaume Bonnard and Guillaume Peltier. It works in nearly twelve markets, with teams that speak at least two languages. Its link building page, available in French, English, Spanish, Italian, German and Dutch, describes a four-step method: strategy based on competition and keyword difficulty, opportunity research, production, then quality control. Its link building quote form asks for the number of links wanted, from fewer than five to more than thirty, and the quality level, up to "press, high traffic" links only, and shows an indicative estimate of €2,990. Its "Projet X" case study, a luxury e-commerce site supported since 2020, lists building popularity through partnerships among the actions taken, for +530% SEO clicks. #### Strengths - Link building offered in six languages. - Online quote form. - Multilingual team present in about a dozen markets. #### Points to watch - General link building page, with no detailed selection criteria. - No case study focused on link building. [See the link building offer](https://www.keyweo.com/fr/seo/services/netlinking/)10 ## [SEO Hackers](https://seohackers.fr/netlinking/) SEO agency of senior consultants since 2012 · Paris ![SEO Hackers website](https://astrak.agency/wp-content/uploads/2026/10/classement-seo-hackers.jpg)SEO Hackers is a Paris agency founded in 2012 by Paul Sanches and Mathieu Gheerbrant, both in SEO since 2006. It has nine senior consultants and claims more than 500 client case studies, from SMEs to CAC 40 groups. Paul Sanches teaches advanced SEO techniques, especially link building, and speaks at SEO Campus and SMX France. The agency presents quality link building as one of its three pillars. Its link building page covers link profile audits, the search for partners and platforms, creating content meant to attract links (articles, infographics, videos) and monitoring the strategy over time, with an approach it calls ethical. The agency also offers backlink analysis and Google penalty removal. Its case studies cover content and internal linking, not link campaigns. #### Strengths - Founders who teach and speak on link building. - Senior consultants only. - Backlink analysis and penalty recovery. #### Points to watch - General link building page, with no detailed method. - No published link building case study, no price shown. [See the link building offer](https://seohackers.fr/netlinking/) ## Agencies we reviewed but left out About twenty players were reviewed. Several names often cited are link buying platforms rather than agencies: Develink, Accesslink, 1ère Place, Paper Club, Getfluence or Rocket Links. Agence-Netlinking.fr presents a detailed method, but no team and no published case study. Origine (formerly Orixa Media) and UpByWeb have a link building page, with no case study that details link work. Pixalione combines link building and online reputation on a brief page. Slashr and L'Agence WAM have no dedicated link building offer, and Primelis has repositioned on martech. SEO.fr, Noiise and Digimood have a real link offer, but do not yet publish a link building case study with figures. ## Where the links in a link building campaign come from Links are still one of the signals that weigh most on rankings, and now on the sources AI tools cite. Not all agencies buy their links the same way: ask which source yours will come from. Purchase ### Sponsored articles An article published on a site with the same topic, bought directly from the publisher or through a platform. The price is known in advance, and the site can be checked before buying: real traffic, topic, indexing. Press relations ### Earned links Studies, data and expert commentary offered to journalists. Earned links are often the strongest, but their number cannot be guaranteed. Networks ### The agency's own sites Some agencies own their own sites. Links arrive fast, but they depend on the agency: ask whether they stay in place when the contract ends. Monitoring ### Indexing A link on a page that Google does not index brings nothing. A serious campaign checks each link over time and follows up on or replaces those that drop out of the index. ## How to choose a link building agency? The most useful question is also the simplest: **how much did each link cost, and how much does your work cost?** An agency that mixes the two in a flat fee can take a large margin on the links without you seeing it. Then ask: **what criteria do you use to choose sites?** Real traffic and topic matter more than a tool score. **Who writes the articles, and can I review them?** **Do the links stay in place if I stop?** **How do you check that they are indexed?** Before launching a campaign, a [SEO audit](https://astrak.agency/en/best-seo-audit-agency/) shows whether links are really what you are missing. For the content that goes with the links, see our ranking of [SEO writing agencies](https://astrak.agency/en/best-seo-writing-agency/). ## How much does a link building campaign cost? A campaign is paid per link or as a flat fee. Semjuice publishes the most detailed price list: from €50 to €550 excl. VAT per link depending on the site's strength and the article length, €25 excl. VAT for a directory, and from €700 excl. VAT for a media outlet. Junto shows support from €800 to €2,000 per month. Astrak and Onze rebill links at the price paid to the publisher and bill their work separately. Onze lists its link building audit at €975. A flat fee that mixes links and fees is not necessarily more expensive, but it does not tell you what each link costs. Ask for the breakdown, link by link: it is the only way to compare two proposals. Transparency ## Ranking Methodology About twenty players were found in Google results for "agence netlinking", "campagne de netlinking", "achat de liens" and their variants, and in the queries AI assistants run to compare agencies. Each one's site was reviewed on 15/10/2026. Link buying platforms, which sell placements without running a strategy, are not ranked. The prices and results cited are those the agencies publish themselves: when two pages from the same agency contradicted each other, we used the case study page and flagged the gap. No agency paid to appear in this ranking. #### Method Link sources, site selection criteria, anchors, acquisition pace. #### Price transparency Price per link, flat fee or separate fees: what is actually published. #### Monitoring Link-by-link report, indexing checks, what happens to links at the end of the contract. #### Proof Cases where a link campaign produced a result with figures, dated if possible. ## Our opinion #### If you want to know what each link costs **Astrak** and **Onze**, who rebill links at the publisher's price, or **Semjuice**, which publishes its price list. #### If you want earned links rather than bought ones **Eskimoz** for editorial link building, **SEO Monkey** for digital press relations, **Résoneo** for online press relations. #### If you are looking for links abroad **Keyweo**, whose offer is available in six languages, or **Eskimoz**, present in five countries. ## Frequently Asked Questions ### What is the best link building agency? In our selection of 15/10/2026: Astrak, Onze, Semjuice, Eskimoz, Junto, SEO Monkey, Uplix, Résoneo, Keyweo and SEO Hackers. To know what each link costs, Astrak and Onze rebill links at the publisher's price, and Semjuice publishes its price list. ### How much does a link building campaign cost? From a few dozen euros to more than €700 excl. VAT per link, depending on the site's strength and topic: Semjuice publishes a price list from €50 to €550 excl. VAT, €25 excl. VAT for a directory and from €700 excl. VAT for a media outlet. For ongoing support, Junto shows €800 to €2,000 per month. ### Link building agency or platform? A platform sells placements: you choose the sites, write the brief and track the links yourself. An agency chooses the pages and anchors, selects the sites, has the articles written and measures the effect. Some agencies buy on platforms and rebill links at the price paid, others sell on their own platforms. ### How long before you see the effect of links? A few weeks to a few months. Junto mentions 4 to 12 weeks for the first ranking gains, Onze about three months after the links are indexed. A link that is not indexed has no effect: check that it is. ### When is it better to wait before doing link building? When the site structure does not yet target the right keywords, when the content does not match search intent, or when technical issues block crawling and indexing. Links amplify a healthy site. They do not fix a blocked one. ## Want to know if links are what you are missing? We compare your link profile with your competitors' and tell you what budget would have an effect. Thirty minutes, no commitment. [Book a meeting](https://astrak.agency/en/en/contact/#calendrier) Léo Poitevin's newsletter ## SEO and GEO that really work, every week Tests, client data and field feedback, read by more than 5,500 people. One email a week, unsubscribe in one click. [Read the latest editions](https://poitevinleo.substack.com/)