The 10 best Sigma consulting firms in 2026

Sigma is quick to start and easy to get wrong at scale: workbooks multiply, metric definitions drift, and migrations from Tableau or Power BI take longer than planned. This list compares ten Sigma consulting firms, with each partner tier checked against Sigma's own directory, so you can find one that fits your size and starting point.

Greyfield Data is on this list. If you are planning a move to Sigma, start with the free Tableau to Sigma migration assessment or Power BI to Sigma migration assessment, or see Sigma consulting.

Disclosure. Greyfield Data wrote this list and ranks itself first. The other nine firms were picked using the criteria below. Every detail about them (partner tier, HQ, services) comes from the firm's own website or Sigma's consulting partner directory, checked in November 2026 and linked in each section. Nobody paid to be included.

Key takeaways

• Sigma launched a tiered SI partner program in 2026 and named its first Elite and Premier partners in May 2026. Elite: Aimpoint Digital, InterWorks, and phData. Premier includes Analytics8, Velir with Brooklyn Data, Hakkoda, Slalom, Spaulding Ridge, and TEKsystems.
• Sigma's partner directory says it has more than 200 consulting and SI partners worldwide, so a firm outside the top tiers can still be a good fit.
• Most Sigma work is really warehouse work. Pick a partner that can fix the Snowflake or dbt layer under a slow or wrong workbook, not just rebuild the dashboard.
• For a migration, ask for an inventory and a pilot before a full quote. Our 9 questions to ask a Sigma migration consultant covers what to ask.

Download the full-size list (PNG)

How did we pick these Sigma partners?

We started from Sigma's consulting partner directory and each firm's own site, and kept firms that met four tests.

Criterion	What we looked for
Focus on Sigma	A dedicated Sigma service page with specific offerings, such as migrations, embedding, or training
Public evidence	A tier in Sigma's partner directory, Sigma certifications, or published Sigma work
Size fit	A mix, from one-lead consultancies to global firms, plus at least one option outside North America
Transparency	Clear services, locations, and ways to start, stated on the firm's own site

We left out TEKsystems, a Sigma Premier partner, only because we could not find a Sigma service page on its own site to describe. The order after Greyfield is not a score: the three Elite partners come next, then Premier partners.

Which Sigma partner fits which team?

#	Firm	Best for	Size	HQ	Notable
1	Greyfield Data	Sigma on Snowflake for ecommerce and operations teams	Independent consultancy	Serves the US	Sigma, Snowflake, and dbt under one lead
2	phData	Large Sigma rollouts and migrations	Large, global delivery	Minneapolis, MN	Sigma Elite; Sigma Delivery Partner Certified
3	InterWorks	Sigma plus licensing, training, and managed services	Mid-size, offices in North America, Europe, and Australia	Stillwater, OK	Sigma Elite
4	Aimpoint Digital	Data apps and embedded insights	Mid-size, offices in US, UK, and Colombia	Atlanta, GA	Sigma Elite; designed Sigma's official learning experience with DataCamp
5	Analytics8	Migrating off legacy BI tools	Mid-size, offices in US, UK, and Eastern Europe	Chicago, IL	Sigma Premier; founded 2002
6	Velir + Brooklyn Data	Embedded Sigma and retail customer analytics	Mid-size digital and data agency	Somerville, MA	Sigma Premier
7	Spaulding Ridge	Sigma alongside a Snowflake Elite practice	Large consultancy	Chicago, IL	Sigma Premier; founded 2018
8	Hakkoda, an IBM Company	BI modernization programs that land on Sigma	Part of IBM	Armonk, NY (IBM)	Sigma Premier
9	Slalom	Sigma AI apps inside wider transformation work	Global consulting firm	Seattle, WA	Sigma Premier
10	Biztory	EMEA teams that want a priced starting package	70+ people, 5 EMEA offices	Kontich, Belgium	Sigma Premier; QuickStart from €4,500

1. Greyfield Data

Greyfield Data is an independent consultancy led by Linus Tse. It builds Sigma workbooks on Snowflake and dbt, and moves reports into Sigma from Tableau and Power BI, mostly for ecommerce and operations teams.

• What they do: Sigma workbook builds, Tableau and Power BI migrations with formula translation and validation, and the Snowflake and dbt models underneath. The Sigma functions list and migration validation guide show the working method.
• Best for: Teams that want one senior lead to own the path from source to workbook, and to leave them able to run it.
• Why it stands out:
  • Deep in Sigma: published a guide to every Sigma function, a Consumer Brand Retention Starter Pack on Sigma Public, and free Tableau and DAX to Sigma formula translators.
  • Migrations with a plan up front: free Tableau and Power BI to Sigma assessments give you a readout before you commit.
  • Results in a published case study: a daily market report rebuilt in Sigma cut report assembly from five hours a week to about thirty minutes.
  • Sigma, Snowflake, and dbt under one lead, so the model under each workbook is built right.
• Link: Sigma consulting

2. phData

phData is an AI and data services company founded in 2014, headquartered in Minneapolis. Sigma lists it as an Elite SI partner, and its Sigma page shows the Sigma Delivery Partner Certified badge.

• What they do: Sigma setup and implementation, migrations, new reports, performance and cost tuning, embedding and data sharing, and user training.
• Best for: Enterprises that want a large team that can also cover Snowflake, dbt, and Fivetran.
• Worth knowing: phData is also a Snowflake Elite partner. See our Snowflake consulting firms list.
• Link: phdata.io

3. InterWorks

InterWorks is a data consultancy founded in 1996 and headquartered in Stillwater, Oklahoma. Its Sigma page says it was named one of the first Sigma Elite partners, which matches Sigma's directory.

• What they do: Sigma consulting and AI app development, licensing, training, rapid starts, migrations, embedded analytics, governance, performance tuning, and managed services.
• Best for: Teams that want one firm for licenses, build, training, and ongoing support.
• Worth knowing: InterWorks also does Tableau work, which helps on Tableau to Sigma migrations.
• Link: interworks.com

4. Aimpoint Digital

Aimpoint Digital is a data and analytics firm founded in 2017, headquartered in Atlanta with team locations in Boston, London, and Medellín per its about page. Sigma lists it as an Elite SI partner.

• What they do: Sigma data apps, embedded insights, and analytics delivery. Its Sigma page lists 30+ Sigma Delivery Certifications and 10+ Sigma Specialist Certifications.
• Best for: Teams building data apps or putting Sigma inside daily workflows, not only dashboards.
• Worth knowing: Sigma and DataCamp chose Aimpoint to design the official Sigma learning experience, which says something about its training depth.
• Link: aimpointdigital.com

5. Analytics8

Analytics8 is a data and analytics consultancy that began in 2002, with its Chicago headquarters and offices across the US, UK, and Eastern Europe. Its Sigma page calls it a Sigma Premier consulting partner, which matches Sigma's directory.

• What they do: Sigma reporting on major cloud platforms, migration from legacy BI tools, training and mentoring, embedded analytics, and AI apps on live warehouse data.
• Best for: Mid-size and enterprise teams moving off an older BI tool that want training built in.
• Worth knowing: If you are still sizing the move, our guide to Sigma migration cost explains what drives a quote.
• Link: analytics8.com

6. Velir + Brooklyn Data

Brooklyn Data is Velir's data studio. Velir was founded in 2000 and lists its office in Somerville, Massachusetts. Sigma lists "Velir x Brooklyn Data" as a Premier SI partner.

• What they do: Per its Sigma page: full report migration, embedded applications, interactive forecasting models, row-level and column-level security, development and production environments, and training.
• Best for: Consumer and retail teams that want embedded Sigma or customer analytics. It promotes an Embedded C360 solution for retail built with Sigma.
• Worth knowing: Velir's digital marketing and CX side can matter if your reporting feeds web personalization. See also our consumer brand analytics consultancies list.
• Link: brooklyndata.co

7. Spaulding Ridge

Spaulding Ridge is a consultancy founded in 2018 with its main office in Chicago and offices in the US, Europe, Canada, India, and the Philippines. Sigma lists it as a Premier SI partner, and Snowflake's directory lists it as Elite, which it announced in 2024.

• What they do: Sigma implementation, connecting Sigma to a cloud data platform, and report and dashboard builds, per its Sigma page.
• Best for: Teams that want Sigma and Snowflake from one partner with a large bench.
• Worth knowing: Its Snowflake page says it pairs Snowflake work with tools such as Sigma, dbt, and Fivetran.
• Link: spauldingridge.com

8. Hakkoda, an IBM Company

Hakkoda is a data consultancy that IBM acquired in April 2025. Sigma lists "Hakkoda, an IBM Company" as a Premier SI partner.

• What they do: A BI rationalization and migration service that moves reporting to a modern BI environment such as Sigma, alongside its Snowflake practice.
• Best for: Large organizations consolidating several BI tools as part of a bigger data modernization.
• Worth knowing: Hakkoda is also a Snowflake Elite partner, so it appears on our Snowflake list.
• Link: hakkoda.io

9. Slalom

Slalom is a global consulting firm based in Seattle. Sigma lists it as a Premier SI partner, and its partners page describes a Sigma practice that helps organizations "move beyond dashboards to action" with Sigma's AI App framework.

• What they do: Sigma analytics and AI apps as part of wider strategy, technology, and change programs.
• Best for: Organizations where Sigma is one part of a larger transformation with business process work attached.
• Worth knowing: Slalom is also a Snowflake Elite partner.
• Link: slalom.com

10. Biztory

Biztory is a data and AI consultancy with 70+ team members and five offices across EMEA, including Belgium, the UK, Germany, and the Netherlands. Sigma's directory lists it as a Premier partner.

• What they do: Sigma dashboards, Ask Sigma, embedded analytics, and data modeling. Its Sigma page publishes starting prices: a Sigma Platform QuickStart from €4,500 and a Snowflake + Sigma QuickStart from €8,000.
• Best for: European teams that want a local Sigma partner and a priced first step.
• Worth knowing: Published starting prices are rare in this market and make early budgeting easier.
• Link: biztory.com

How should you choose a Sigma consulting partner?

Decide what you are buying first: a migration, a new build, embedded analytics, or ongoing support. Then test each partner on the parts that usually go wrong.

Questions to ask

• Will you inventory our current reports before quoting? Our guide to which dashboards to migrate, consolidate, or retire shows why.
• How do you translate formulas? Ask for an example from our tool, such as a Tableau LOD or a DAX measure, rewritten in Sigma.
• How will you prove the new numbers match the old ones?
• Who fixes the warehouse layer if a workbook is slow or wrong?
• What training and documentation do we get, and who owns the workbooks afterwards?

Red flags

• A fixed price before anyone has seen your report inventory.
• A plan to rebuild every dashboard one for one, with no consolidation.
• No validation step before cutover. See 10 checks before a Sigma migration cutover.
• No one on the team who can work in Snowflake, dbt, or your warehouse.

Frequently asked questions

What are Sigma's partner tiers?

Sigma's SI partner program has three tiers. In May 2026 Sigma named its first Elite and Premier partners, and its consulting partner directory lists them alongside a wider network of more than 200 partners.

Do I need an Elite Sigma partner?

Not necessarily. A tier shows a firm's track record across Sigma customers. For a smaller rollout or migration, the experience of the specific people on your project, and their knowledge of your warehouse, matter more.

How much does a Sigma migration cost?

It depends on how many reports move, how complex the formulas are, and how much the data layer needs fixing. Our migration cost guide breaks down the drivers, and the free Tableau and Power BI migration assessments give you a starting estimate.

Where does Sigma fit in a data stack?

Sigma sits on top of a cloud data platform such as Snowflake, BigQuery, or Databricks; the supported platforms list shows which ones and which features each supports. Our data stack map shows the layers around it, and the Snowflake consulting firms list covers the warehouse side.

Which list should an ecommerce brand read?

If you sell through Shopify, Amazon, or retail, also read our list of ecommerce data consultancies.

What to do next

If you are moving to Sigma, size the work before you talk to any partner. Run the free Tableau to Sigma or Power BI to Sigma migration assessment, keep the Sigma functions list open while you translate formulas, or book a call with Linus to talk through your scope.