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Callista Software Oü

Callista provides technical and business development services through a full-stack development team and DevOps partners.

Software Development
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Headquarters
Tallinn, Harju County, EstoniaSource: RevenueBaseRetrieved October 13, 2026
Employee range
1 to 10Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
70 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Callista Software Oü do?

Callista combines domain knowledge and technical expertise to help partners bring products to market and scale their businesses.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

Product strategy and architecture

The team works with a client's product owner to iterate on the business plan and product design.

Source: LinkedIn company description · Retrieved October 13, 2026

Back-end development

The team develops back ends using Java and PostgreSQL.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

Share your recognition

Embeddable award for your website

BADGE PREVIEWCallista Software Oü listed #6 on SaaS architecture consulting firms, September 28, 2026Open the published source list.
Callista Software Oü

#6 SaaS architecture consulting firms

Snapshot: September 28, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 4, 2026. Directory positions use company-contact counts from separate saved list snapshots dated August 30, 2026, August 31, 2026, September 5, 2026, September 7, 2026, September 10, 2026, September 12, 2026, September 19, 2026, September 20, 2026, September 22, 2026, September 26, 2026, September 27, 2026, September 28, 2026, September 29, 2026 and September 30, 2026. How the company lists are built.

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