Rollstack vs Gamma:Compare data, templates and next month's update

Where the numbers come from

For Gamma, the starting point is a prompt. Gamma writes the deck, and numbers come from what you type, the files you import, or connectors like Notion and HubSpot that its AI reads while generating. Charts stay linked only to a Google Sheets tab, and Gamma's help center says to "click Sync on the chart to pull in the latest values".

Rollstack starts from the source. The Tableau view, Power BI visual or Snowflake query your analysts already trust is what lands on the slide, with the same filters. That difference might be small for a deck with four numbers, but it's the whole job for a monthly review with 60.

Next month's version

With Gamma, next month means a new prompt or a round of manual syncs, chart by chart. Anything generated again can come back worded or laid out differently, so someone has to reread the whole deck.

With Rollstack, next month is a refresh. Template, layout, commentary and slide order stay as you left them, and only the numbers and charts change.

Checking the numbers

In Gamma, the text and most figures are written by its AI, and nothing links a figure back to where it came from.

In Rollstack, every figure on a slide can be traced back to the raw data and each transformation applied to it. Reviewers can check numbers without rebuilding anything.

When Rollstack's AI makes changes, you can review them before the deck goes out: the original and the edited slide side by side, with all changes highlighted.

Your template, not a theme

Gamma can import a PowerPoint deck with its layouts and design and save it as a workspace template, but it rebuilds each slide into a gamma, Gamma's own proprietary format. Some charts arrive as static images that you recreate manually by typing the data into Gamma's chart block.

Rollstack keeps your template as it is. Upload your PowerPoint file, or import it from Google Slides or OneDrive, and it becomes a reusable template with your masters, placeholders, fonts and footer intact. Pick a dashboard, table or sheet as the source, and Rollstack builds the deck in that template, with native charts connected directly to your data.

One template, every audience

Gamma creates one gamma at a time in the app. Generating many takes your own automation on its API, and each one is new content that needs a full read.

Rollstack Bursts turn one template into a version per region, sales channel, team, product line or client, each filtered to its own data. A change to the template reaches every version on the next run.

Rollstack customers already run their reporting this way:

• Equality Health changes one master template and produces about 2,000 decks a month for its 800+ practices.
• The Orchard's five analysts deliver more than 6,500 tailored reports a quarter to 10K+ clients and labels.
• CarGurus gives its account managers tailored reporting for 30K+ dealer partners.

Permissions, security and your LLM

Gamma is SOC 2 Type II and GDPR compliant, with SSO on its Business plan, and SCIM and audit logs on Enterprise. Access comes from workspace, folder and link sharing.

Rollstack matches these, and goes further in three places that matter to regulated and data-heavy teams:

1. Follows the roles and permissions in your BI tools and warehouse, including row-level security, so each version contains only its audience's data.
2. Supports HIPAA and connects to on-premise BI over VPN.
3. Lets you choose the LLM, whether that's Claude Opus 5.5, GPT 6.1 Sol or your own Azure AI Foundry account. In Gamma, you can pick an image model but not the language model. Rollstack's model providers don't train on your data.

Here's a common scenario: you own the monthly review for 120 client accounts. Each deck has 14 slides and about 40 numbers: usage, support tickets, adoption by feature, ROI and open issues.

With Gamma, you'd generate a deck per client from a prompt, or link Smart Charts to a Google Sheet and sync each chart in each deck. That's 120 decks and about 4,800 numbers to place, then the same again next month, with every regenerated deck needing a full read.

With Rollstack, you build the template once against your usage dashboard, add a client filter and schedule the run for the first business day of the month. Rollstack builds 120 decks in your template, each with that client's numbers. Next month, the same 120 decks refresh in place, and any edits account managers made are still there.