Index.dev vs BairesDev: full comparison for 2026
Quick verdict
Index.dev (4.2/5) edges ahead of BairesDev (3.9/5) overall. Index.dev is the better choice for startups that want a 30-day refundable trial before committing to a remote ML engineer. BairesDev is the stronger option for U.S. companies that need ML engineers alongside a larger nearshore software team. The right choice depends on your project size, budget, and required tech stack.
Index.dev vs BairesDev: head-to-head summary
| Criterion | Index.dev | BairesDev |
|---|---|---|
| Founded | 2019 | 2009 |
| HQ | London, United Kingdom | San Francisco, California, USA |
| Team size | 30,000+ network | 4,000+ |
| Rating | 4.2 / 5 | 3.9 / 5 |
| Primary differentiator | A 30-day trial with full refund on every placement | Thousands of Latin American engineers available in U.S. time zones |
| Pricing model | Monthly rate per engineer; direct-hire fee option; 30-day trial with refund; rates on request | Monthly per engineer or team; rates on request |
| Min. engagement | Not published | Not published |
| Primary tech stack | Python, PyTorch, TensorFlow | Python, TensorFlow, PyTorch |
| Industries served | SaaS, Fintech, E-commerce, Healthcare, AI labs | Technology, Financial services, Healthcare, Retail, Media |
Index.dev vs BairesDev: overview
Index.dev
Index.dev is a London company, founded in 2019 according to its own job ads, trading under the legal name Index Soft Limited. It calls itself an AI-first engineering talent platform. Its main network has more than 30,000 engineers in Latin America and Central and Eastern Europe, and a separate AI unit supplies Master's and PhD-level people for LLM fine-tuning and RAG work. Every engineer goes through five stages of vetting run by people, including a live screening call and technical validation, and Index.dev says about 1% are accepted. All placements come with a 30-day trial and a full refund if the match fails.
BairesDev
BairesDev was founded in Buenos Aires in 2009 and is now headquartered in San Francisco, with several thousand engineers across Latin America. It sells staff augmentation, dedicated teams and project delivery, and its AI practice covers ML, data engineering and generative AI. Its size means it can add many engineers quickly in U.S. time zones. AI is one practice inside a general software company, though, and its marketing volume is larger than the specialist evidence behind its AI work.
Services and capabilities: Index.dev vs BairesDev
| Capability | Index.dev | BairesDev |
|---|---|---|
| ML engineers | ✓ | ✓ |
| LLM / GenAI engineers | ✓ | ✓ |
| AI agent developers | ✗ | ✗ |
| MLOps engineers | ✗ | ✗ |
| Computer vision engineers | ✗ | ✗ |
| NLP engineers | ✗ | ✗ |
| Data engineers | ✗ | ✓ |
| Engineer-led technical screen | ✗ | ✗ |
| Fractional / part-time experts | ✗ | ✗ |
| Trial before commitment | ✓ | ✗ |
| Nearshore time-zone overlap | ✓ | ✓ |
| Direct hire option | ✓ | ✗ |
Tech stack comparison: Index.dev vs BairesDev
| Framework / platform | Index.dev | BairesDev |
|---|---|---|
| PyTorch | ✓ | ✓ |
| TensorFlow | ✓ | ✓ |
| LangChain | ✓ | N/A |
| Hugging Face | ✓ | N/A |
| OpenAI | ✓ | ✓ |
| AWS | ✓ | ✓ |
| Azure | N/A | ✓ |
| Google Cloud | ✓ | ✓ |
| Databricks | N/A | ✓ |
| Kubernetes | N/A | N/A |
Pricing comparison: Index.dev vs BairesDev
| Criterion | Index.dev | BairesDev |
|---|---|---|
| Minimum engagement | Not published | Not published |
| Engagement models | Dedicated engineer, Dedicated team, Direct hire, Trial period | Dedicated engineer, Dedicated team, Project delivery |
| Rate transparency | Not public | Not public |
| Price tier | Mid-market | Mid-market |
Target audience comparison: Index.dev vs BairesDev
| Dimension | Index.dev | BairesDev |
|---|---|---|
| Best company size | Startup to mid-market | Startup to mid-market |
| Best industries | SaaS, Fintech, E-commerce | Technology, Financial services, Healthcare |
| Best use cases | Trialling a Latin American ML engineer for a month before committing, Hiring a PhD-level specialist to fine-tune an open-source LLM | Adding ML engineers to a nearshore product team, Staffing data engineers for a cloud data warehouse |
| Typical project type | Dedicated engineer | Dedicated engineer |
Index.dev vs BairesDev: pros and cons
| Index.dev | |
|---|---|
| + | The 30-day refundable trial is the most generous published trial on this page |
| + | A separate AI unit for advanced work such as fine-tuning |
| + | Clients can hire directly as well as contract |
| - | Vetting is human-led but not specifically run by ML engineers |
| - | Network figures and acceptance rates are company claims |
| - | Founding date only appears in job listings |
| BairesDev | |
|---|---|
| + | Can staff large mixed teams of ML and software engineers |
| + | Latin American engineers work U.S. hours |
| + | Mature contracting and onboarding process |
| - | AI is one practice among many, so specialist depth varies |
| - | Screening is run at volume and not described as engineer-led for ML roles |
| - | No public rates |
Who should choose Index.dev?
A typical fit: trialling a Latin American ML engineer for a month before committing.
A 30-day trial with full refund on every placement. Minimum engagement is not publicly disclosed. Works best with clients in SaaS, Fintech, E-commerce, Healthcare, AI labs.
Who should choose BairesDev?
A typical fit: adding ML engineers to a nearshore product team.
Thousands of Latin American engineers available in U.S. time zones. Minimum engagement is not publicly disclosed. Works best with clients in Technology, Financial services, Healthcare, Retail, Media.
Decision matrix: Index.dev vs BairesDev
| Your situation | Recommended choice |
|---|---|
| You want a working engineer, not a recruiter, to run the technical screen | Neither documents an engineer-led screen; run your own technical interview |
| You need one specialist for a few days a week | Neither advertises part-time experts; ask about reduced hours |
| You need several engineers working as one team | BairesDev |
| You want to test an engineer before committing | Index.dev |
| Your budget is at the lower end | Compare: Index.dev (Not published) vs BairesDev (Not published) |
| Your team works U.S. hours | Both; Index.dev rates higher overall |
| You may want to hire the engineer permanently later | Index.dev |
Use case fit: Index.dev vs BairesDev
| Use case | Index.dev fit | BairesDev fit | Winner |
|---|---|---|---|
| Trialling a Latin American ML engineer for a month before committing | Strong | Limited | Index.dev |
| Hiring a PhD-level specialist to fine-tune an open-source LLM | Strong | Limited | Index.dev |
| Adding ML engineers to a nearshore product team | Limited | Strong | BairesDev |
| Staffing data engineers for a cloud data warehouse | Limited | Strong | BairesDev |
Verdict: Index.dev vs BairesDev
Index.dev (4.2/5) is the stronger overall choice for most AI Engineer Staffing projects. A 30-day trial with full refund on every placement.
BairesDev (3.9/5) is worth a look if you need staffing data engineers for a cloud data warehouse. If your situation matches that, BairesDev is a competitive option.
Related comparisons
Index.dev vs BairesDev FAQ
Is Index.dev better than BairesDev?
Index.dev (4.2/5) scores higher overall, but "better" depends on your use case. Index.dev's strongest advantage: the 30-day refundable trial is the most generous published trial on this page. BairesDev's strongest advantage: can staff large mixed teams of ML and software engineers.
How do Index.dev and BairesDev differ in pricing?
Index.dev uses monthly rate per engineer; direct-hire fee option; 30-day trial with refund; rates on request pricing. BairesDev uses monthly per engineer or team; rates on request pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.
Which is better for enterprise: Index.dev or BairesDev?
Index.dev is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each company before shortlisting.
What are the main differences between Index.dev and BairesDev?
Index.dev's primary differentiator is: a 30-day trial with full refund on every placement. BairesDev's primary differentiator is: thousands of Latin American engineers available in U.S. time zones. They also differ in team size (30,000+ network vs 4,000+), minimum engagement (Not published vs Not published), and primary industries served (SaaS, Fintech vs Technology, Financial services).
Verify all details directly with each company before making a decision.