Rootstrap vs B12 Consulting: full comparison for 2026
Quick verdict
Rootstrap (3.9/5) edges ahead of B12 Consulting (3.7/5) overall. Rootstrap is the better choice for multi-agent workflows integrated into shipped products. B12 Consulting is the stronger option for Small, deeply technical, physics-founded Belgian agency. The right choice depends on your project size, budget, and required tech stack.
Rootstrap vs B12 Consulting: head-to-head summary
| Criterion | Rootstrap | B12 Consulting |
|---|---|---|
| Founded | 2011 | 2012 |
| HQ | West Hollywood, CA, USA | Louvain-la-Neuve, Belgium |
| Team size | 201–500 | 11–50 |
| Rating | 3.9 / 5 | 3.7 / 5 |
| Primary differentiator | Known specifically for integrating multi-agent workflows into shipped digital products, not standalone backend automation | Founded by PhDs in Physics, giving it a research-adjacent, deeply technical culture uncommon among agencies of its size |
| Pricing model | Fixed project, dedicated team | Fixed project, staff augmentation |
| Min. engagement | Not published | Not published |
| Primary tech stack | Python, LangChain, React | Python, LangChain, AWS |
| Industries served | Technology & SaaS, Retail & E-commerce, Healthcare | Manufacturing, Technology & SaaS |
Rootstrap vs B12 Consulting: overview
Rootstrap
Rootstrap is a software development agency founded in 2011 and headquartered in West Hollywood, California, with additional offices in New York, Montevideo, and Buenos Aires, and roughly 190–200 employees. It is known specifically for integrating multi-agent workflows into digital products rather than delivering standalone backend automation, applying existing product-engineering discipline to agentic feature work. An Inc. 5000 honoree, its Latin American delivery centers give it a cost-effective bench for agency-scale engagements.
B12 Consulting
B12 Consulting was founded in 2012 by a group of PhDs in Physics sharing a passion for complex problem solving, headquartered in Louvain-la-Neuve, Belgium with an additional Brussels presence, and roughly 35 FTE. It is an agency expert in artificial intelligence, data science, and custom software development, with a technical, research-adjacent culture reflecting its founders' academic backgrounds.
Services and capabilities: Rootstrap vs B12 Consulting
| Capability | Rootstrap | B12 Consulting |
|---|---|---|
| Multi-agent orchestration | ✓ | ✗ |
| RAG / knowledge integration | ✗ | ✗ |
| Workflow & systems integration | ✓ | ✓ |
| Coding agents | ✓ | ✗ |
| Monitoring & anomaly detection | ✗ | ✗ |
| Customer-facing agents | ✗ | ✗ |
Tech stack comparison: Rootstrap vs B12 Consulting
| Framework / platform | Rootstrap | B12 Consulting |
|---|---|---|
| LangChain | ✓ | ✓ |
| LangGraph | N/A | N/A |
| AutoGen | N/A | N/A |
| LlamaIndex | N/A | N/A |
| OpenAI | N/A | N/A |
| Anthropic Claude | N/A | N/A |
| Pinecone | N/A | N/A |
| AWS | ✓ | ✓ |
| Azure | N/A | N/A |
| Kubernetes | N/A | N/A |
Pricing comparison: Rootstrap vs B12 Consulting
| Criterion | Rootstrap | B12 Consulting |
|---|---|---|
| Minimum engagement | Not published | Not published |
| Engagement models | Fixed project, Dedicated team | Fixed project, Staff augmentation |
| Rate transparency | Minimum disclosed | Minimum disclosed |
| Price tier | Mid-market | Mid-market |
Target audience comparison: Rootstrap vs B12 Consulting
| Dimension | Rootstrap | B12 Consulting |
|---|---|---|
| Best company size | Startup to mid-market | Startup to mid-market |
| Best industries | Technology & SaaS, Retail & E-commerce, Healthcare | Manufacturing, Technology & SaaS |
| Best use cases | Integrating multi-agent workflows directly into a consumer or enterprise digital product, Startups needing both product engineering and agentic AI capability from one agency | Buyers wanting a small, technically rigorous Belgian agency for a well-scoped project, Complex data-science-adjacent agentic AI problems suited to a research-oriented team |
| Typical project type | Fixed project | Fixed project |
Rootstrap vs B12 Consulting: pros and cons
| Rootstrap | |
|---|---|
| + | Specific track record integrating multi-agent workflows directly into shipped digital products |
| + | Multi-region footprint (US, Uruguay, Argentina) balances US account management with cost-effective delivery |
| + | Inc. 5000 honoree with over a decade of operating history since 2011 |
| + | Product-engineering discipline means agentic features arrive with real UX consideration |
| - | Minimum engagement figures are not published, requiring direct sales contact for early budgeting |
| - | Broader product-agency origins mean agentic-specific depth should be confirmed against narrower specialists |
| - | Reported headcount varies by source (roughly 191 to 500), worth confirming directly |
| B12 Consulting | |
|---|---|
| + | Founded by PhDs in Physics, giving it an unusually research-adjacent technical culture |
| + | Over a decade of continuous operating history since 2012 |
| + | Brussels presence alongside Louvain-la-Neuve headquarters gives access to EU institutional buyers |
| + | Compact ~35 FTE team keeps senior staff hands-on across every engagement |
| - | Very small team (~35 FTE) caps capacity for large or highly parallel programs |
| - | Minimum engagement figures are not published, requiring direct sales contact for early budgeting |
| - | Fewer named large-enterprise case studies than other agencies on this list |
Who should choose Rootstrap?
A typical fit: integrating multi-agent workflows directly into a consumer or enterprise digital product.
Known specifically for integrating multi-agent workflows into shipped digital products, not standalone backend automation. Minimum engagement starts at Not published. Works best with clients in Technology & SaaS, Retail & E-commerce, Healthcare.
Who should choose B12 Consulting?
A typical fit: buyers wanting a small, technically rigorous Belgian agency for a well-scoped project.
Founded by PhDs in Physics, giving it a research-adjacent, deeply technical culture uncommon among agencies of its size. Minimum engagement starts at Not published. Works best with clients in Manufacturing, Technology & SaaS.
Decision matrix: Rootstrap vs B12 Consulting
| Your situation | Recommended choice |
|---|---|
| You need full-ownership delivery on a defined project scope | Rootstrap |
| You need a large dedicated team for an ongoing programme | Rootstrap |
| Your budget is at the lower end | Compare: Rootstrap (Not published) vs B12 Consulting (Not published) |
| You need specialist depth in a specific vertical | Rootstrap |
| You need staff augmentation or team extension | Neither; consider alternatives that offer staff aug |
| You need consulting before committing to a build | Both may offer discovery engagements |
Use case fit: Rootstrap vs B12 Consulting
| Use case | Rootstrap fit | B12 Consulting fit | Winner |
|---|---|---|---|
| Integrating multi-agent workflows directly into a consumer or enterprise digital product | Strong | Limited | Rootstrap |
| Startups needing both product engineering and agentic AI capability from one agency | Strong | Limited | Rootstrap |
| Buyers wanting a small, technically rigorous Belgian agency for a well-scoped project | Limited | Strong | B12 Consulting |
| Complex data-science-adjacent agentic AI problems suited to a research-oriented team | Limited | Strong | B12 Consulting |
| Fixed-price build | Limited | Limited | Both equally |
| Staff augmentation | Limited | Limited | Both equally |
Verdict: Rootstrap vs B12 Consulting
Rootstrap (3.9/5) is the stronger overall choice for most AI Agent Development projects. Known specifically for integrating multi-agent workflows into shipped digital products, not standalone backend automation.
B12 Consulting (3.7/5) is worth a look if you need complex data-science-adjacent agentic AI problems suited to a research-oriented team. If your situation matches that, B12 Consulting is a competitive option.
Related comparisons
Rootstrap vs B12 Consulting FAQ
Is Rootstrap better than B12 Consulting?
Rootstrap (3.9/5) scores higher overall, but "better" depends on your use case. Rootstrap's strongest advantage: specific track record integrating multi-agent workflows directly into shipped digital products. B12 Consulting's strongest advantage: founded by PhDs in Physics, giving it an unusually research-adjacent technical culture.
How do Rootstrap and B12 Consulting differ in pricing?
Rootstrap uses fixed project, dedicated team pricing with a minimum engagement of Not published. B12 Consulting uses fixed project, staff augmentation pricing with a minimum engagement of Not published. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.
Which is better for enterprise: Rootstrap or B12 Consulting?
Rootstrap is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each agency before shortlisting.
What are the main differences between Rootstrap and B12 Consulting?
Rootstrap's primary differentiator is: known specifically for integrating multi-agent workflows into shipped digital products, not standalone backend automation. B12 Consulting's primary differentiator is: founded by PhDs in Physics, giving it a research-adjacent, deeply technical culture uncommon among agencies of its size. They also differ in team size (201–500 vs 11–50), minimum engagement (Not published vs Not published), and primary industries served (Technology & SaaS, Retail & E-commerce vs Manufacturing, Technology & SaaS).