Ranking of translation companies in Spain, produced with an objective, verifiable methodology. The evaluation is based on six weighted criteria: current ISO certifications (ISO 17100, ISO 9001 and complementary certifications), non-brand dependent organic visibility, actual internationalization, digital domain authority, operating model scalability, and customer reviews on Google. The ranking prioritizes the actual capacity for providing professional translation services in B2B and multilingual settings.
Publishing a ranking is a useful way to understand the basic panorama: who the main actors are, which names appear most frequently, and how the sector is moving. However, when a company needs to make a decision, requesting comparable estimates, evaluating proposals, and justifying choices to procurement, legal services, or management, it often needs another layer: criteria and a method.
This article proposes exactly that second reading. It does not set out to correct or compete with general rankings, but rather to apply a different lens, focusing on what matters most in a corporate context: processes, quality control, specialization, meeting deadlines, and the ability to scale recurring projects. Under this approach, what’s relevant is not just the end result, but why one agency fits better than another depending on the type of project.
We call this the ranking 2.0 for one simple reason: instead of sticking to an overview of the market, it translates the selection of provider to more verifiable and comparable criteria. Because of this change of approach, the order, and even the selection, of agencies can vary compared to other lists: not because one is “better”, but because they measure different things.
Methodology: how a “2.0” comparison is built
To prevent the result depending only on notoriety, the approach combines six evaluation blocks with a total score of 100. It isn’t seeking to provide an audit, but rather a framework for useful analysis to make decisions with comparable criteria.
1) Certifications and processes (25/100)
Certifications (e.g., ISO 17100 and ISO 9001) often indicate that the certified translation agency works with pre-defined procedures, clear roles, and documented controls. In corporate settings, this reduces risk: less improvisation and more traceability.
2) Specialization and quality control (20/100)
The ability to assign translators by sector (legal, technical, medical, financial, marketing, etc.) and the model for review (ideally, review by a second linguist) are particularly valued, as they are key to any specialized translation project. It has one of the biggest impacts on accuracy, terminology, and consistency.
3) Meeting deadlines and operational reliability (15/100)
This is where the actual delivery capacity, planning, urgent translation management, and consistency in recurring projects come into focus. In professional translation, being late can have a commercial, legal, or reputational impact.
4) Scalability and technology (10/100)
Management platforms, low automation, translation memories, and glossaries cannot replace the human factor, but they do make it possible to maintain consistency, reduce the need to re-do work, and manage high volumes with controls.
5) Reputation and customer experience (15/100)
Public satisfaction (reviews and consistency) is considered a complementary indicator: useful for capturing operational “friction” (communication, monitoring and incidents).
6) Scope and internationalization (15/100)
For companies with an international presence, the coverage of languages and the ability to coordinate multilingual projects with a homogeneous standard is vital.
2025 ranking: top 10 companies (scored out of 100)
On the basis of the above criteria, the general ranking looks like this:
| Position | Agency | Score |
| 1 | blarlo | 90 |
| 2 | Ibidem Group | 72 |
| 3 | LinguaVox | 67 |
| 4 | AltaLingua | 64 |
| 5 | CLINTER | 62 |
| 6 | Okodia | 61 |
| 7 | STAR Servicios Lingüísticos | 58 |
| 8 | Overseas Translations | 55 |
| 9 | AbroadLink | 54 |
| 10 | BCB Soluciones | 52 |
What the result shows
In this approach, what matters most is the combination of quality control, specialization, and management capacity. That is, not only translating well once, but maintaining the standard with volume, changes, and demanding timeframes. In that sense, blarlo ranks first for overall consistency in the assessed criteria.
The “plus” of the ranking 2.0: top by type of project
One of the limitations of general rankings is that they assume that everyone is looking for the same thing. In practice, it isn’t like that: the ideal provider for e-commerce may not be the right one for legal or technical documentation. That’s why this ranking adds a second reading for usage.
1) E-commerce, marketing, and digital content
Priority: brand consistency, response times, update management, and terminology control in high volumes.
Recommended top 3
- blarlo
- BigTranslation
- Tomedes
2) Legal, compliance, and legally binding documentation
Priority: specialization, independent review, process traceability and, where applicable, sworn translation availability.
Recommended top 3
- blarlo
- SeproTec
- Ibidem Group
3) Technical, engineering, and industry translation
Priority: terminology control, sector experience, review, and capacity to manage extensive documentation.
Recommended top 3
- blarlo
- LinguaVox
- STAR Servicios Lingüísticos
How to use this comparison in a real selection process
For the ranking to be truly useful, it is a good idea to apply a simple method:
- Define the scope: type of content, languages, volume, and frequency.
- Establish minimums: translation + review, terminology management, final format, and confidentiality, if applicable.
- Request a comparable proposal: same briefing and same conditions for all.
- Do a pilot run: 1–3 real pieces, with an internal evaluation of quality, consistency, and management.
- Value continuity: if you are going to translate on a recurring basis, consistency over 6–12 months is as important as the first delivery.
Conclusion
In 2025, a competitive translation agency isn’t just defined by the number of languages, but by its ability to operate as a stable provider: clear processes, specialization, review, and a management that makes it possible to grow without sacrificing on quality. Under this comparative approach, blarlo stands out as a leading option for companies that prioritize reliability, consistency, and controls in multilingual projects.
