Free Tier Limits: What Runs Out First in a RAG Pilot?
Free tier limits vary by workload: compare storage, capacity, API, model use and trial dates to find what binds first and assess Seahorse plans.
A team running a free RAG pilot needs to forecast which allowance or date binds first. Track storage, query and write units, model usage, credits, and trial duration separately, then name the action at each threshold. This guide turns the measured pilot demand into a limit and upgrade decision.
Key takeaways
What usually runs out first? The constraint your account's offer and workload reach first.
- Forecast each meter: Track ingestion, stored data, vector capacity, API activity, model use, and test duration separately.
- Track dates as well as balances: A trial can end while credit remains, or eligible usage can consume a balance before the offer expires.
- Keep units separate: Map user questions to measured API operations, RU/WU, tokens and storage.
- Check the next action: Record whether the selected account stops, bills overages or permits a configured recharge.
Why no single limit runs out first
A free offer can be a time-limited trial, a one-time credit balance, a recurring usage quota, a resource-capacity allowance, or a restriction on which features the account can use. These limits measure different things, so a team's first blocker depends on its service mix, account status, test duration, and workload.
For example, Google Cloud's Free Tier documentation separates a $300 welcome credit from access to its Free Tier offers. Google Cloud's Free Tier terms exclude Gemini API in AI Studio costs from the $300 welcome credit. A project can therefore have a remaining credit balance and still need a separate billing route for a particular model service.
AWS's Free Tier FAQs distinguish Always Free usage with service-specific limits, short-term trials with a stated period or one-time limit, and a credit-based Free account plan.
The calendar can bind before usage does. Under Google's Free Trial terms, the trial ends when its $300 credit is spent or 90 days pass from sign-up, whichever comes first without an upgrade to a paid account. AWS's July 2025 Free Tier announcement describes a Free account plan that ends six months after sign-up or when credits are depleted, whichever comes first.
Some limits are eligibility rules rather than quantities that gradually run down. Under the Amazon EC2 Free Tier usage guide, eligible instance types differ by account creation date: the listed types changed for accounts created on or after July 15, 2025. For an EC2-hosted RAG pilot, that date-based eligibility can determine whether the selected instance qualifies for the free offer.
| Limit type | What triggers it | RAG pilot example | Compare this term |
|---|---|---|---|
| Trial window | Days elapsed from the offer start | The evaluation continues after the offer expires | End date, recovery window, and upgrade timing |
| One-time credit or free-use balance | Eligible usage consumes the stated balance | Each offer covers only its listed services and activities | Eligible activity, expiration date, and remaining balance |
| Recurring usage quota | A service-specific amount measured over a stated period | Requests or operations accumulate during the plan's measurement window | Unit, limit, measurement period, and account-specific terms |
| Storage or capacity allowance | Data or provisioned resource occupies capacity | Seahorse Starter lists separate 5GB data-storage and 5GB vector-cluster entries | Which data counts toward each capacity figure |
| Feature restriction | A plan, product, or account-eligibility condition | The required model or processing feature is outside the offer | Which plan or billing status enables the feature |
A listed or included amount is not, by itself, evidence of a hard technical quota or automatic service suspension. Verify the selected plan’s treatment of excess usage; do not interpret 1M RU/WUs as one million user questions or a separate one-million allowance for each unit.
How to estimate the first RAG pilot limit
Map every step in the workload to the meter the provider actually uses. A RAG system can process source files, store the originals, create and retain vector data, retrieve passages for questions, and call models to prepare embeddings or generate answers. Each step can have its own allowance, even when one platform manages several of them together.
For the platform option in this guide, the Seahorse price sheet lists separate data-storage, vector-cluster, and API entries. Map the pilot worksheet to those units; source bytes, index capacity, and operation units remain distinct forecast inputs.
| Pilot activity | Record during a representative test | Match the observation to |
|---|---|---|
| Ingest and update documents | File count, source-data size, pages or records processed, and reprocessing volume | Parser, ingestion, embedding, or platform-use allowances in the service terms |
| Retain source material | Stored source-data size at the end of ingestion and after updates | The plan's data-storage allowance |
| Build and retain the index | Vector-cluster or index usage after the corpus is processed | The plan's vector or database capacity allowance |
| Serve retrieval and API calls | Query count, read/write activity, retries, and evaluation runs | The provider's request, read/write, or API operation units |
| Generate answers and embeddings | Model calls and the consumption units shown by the model provider | That model's own quota, credit, or billing meter |
| Run the evaluation | Start and end dates, team size, test sessions, and scheduled jobs | Trial duration and any time-based offer expiry |
Use the same test period across the rows, then project the results to the expected pilot duration and team size. For example, assume 12 pilot users each submit 8 questions per workday for 15 workdays: the expected query count is 1,440 before retries, scheduled evaluations, or regression tests.
A user question is not a billable unit. Measure the API operations, RU/WU and model tokens generated by each representative workflow.
Include corpus setup and change traffic, not just live questions. A static handbook may produce most of its ingestion activity at the beginning, while a frequently updated document collection repeats processing and index updates throughout the pilot. Run at least one representative update so the forecast captures that work rather than multiplying only the initial import.
Forecast initial ingestion and re-embedding separately from steady daily query activity. Dividing remaining eligible credit by a stable measured daily eligible charge gives only a rough duration estimate; expiry or another applicable quota may bind sooner.
Measure the resulting data and operation counts after a real test batch. Source file size, indexed size, and an API's billable operation units are not necessarily interchangeable measurements. Use the console or usage report that belongs to each service to map your observed test to its plan limit, and keep the units separate in the forecast.
Seahorse Cloud Starter and Standard allowances
Seahorse Cloud is relevant when the team wants managed RAG components for storage, retrieval, document parsing, and agents in one platform. Its published Starter and Standard entries provide a concrete comparison across a one-time free-use balance, data storage, vector-cluster capacity, and API usage units.
Under Seahorse Cloud pricing, checked on October 14, 2026, Starter and Standard have the following terms:
| Plan | Published billing and price | Listed free usage | Listed capacity or API entries |
|---|---|---|---|
| Starter | On-demand; usage-based prepaid billing | One-time 50,000 KRW free usage for one month | 5GB Seahorse Vector DB cluster; 5GB data storage |
| Standard | Starts at 30,000 KRW per month; usage-based postpaid billing | One-time 50,000 KRW free usage for one month | 5GB Seahorse Vector DB cluster included; 5GB data storage included; 1M Seahorse API RU/WUs included |
Read each row as separate constraints, not as a single combined capacity. The Starter plan's 50,000 KRW one-time free usage is a balance expressed in currency.
Its 5GB entries describe vector-cluster and data-storage capacity. A team can therefore have remaining free usage while approaching a storage entry, or use capacity comfortably while consuming its free-use balance through activity.
Seahorse's API reference separates storage in GB, inference in tokens, and Database API activity in RU/WU; its billing index prices Database API queries at KRW 16,000 per 1M RU and writes at KRW 6,000 per 1M WU.
What to verify when an allowance ends
Check the end behavior before exposing the pilot to users, because a trial can stop workloads while a paid account can continue using billable services. The account state, service, and specific free offer determine whether the next event is a reset, a pause, a restriction, or a charge.
Under Google's Free Trial FAQ, workloads shut down when the trial ends. Under the same Free Trial FAQ, users can upgrade within 30 days after trial end to reinstate service and recover trial-period resources and data. That gives a RAG team a concrete continuity deadline to include in its deployment plan.
AWS's Free Tier FAQs state that usage beyond the credit balance is billed at standard service rates for customers on a Paid plan, including automatic charges for use beyond the balance or for services to which credits do not apply. The plan status matters: identify whether the account remains on its Free plan or has moved to Paid before predicting what happens when credits run out.
Google Cloud's budget guidance distinguishes alerts-only budgets, which notify specified recipients when actual or forecast costs cross configured thresholds, from spend caps; alerts-only budgets do not automatically cap usage or spending.
Where a supported project service offers a spend-cap budget, verify its coverage, activation, billing-delay behavior, and recovery procedure before relying on it. A project-scoped or service-scoped cap is not evidence that every RAG dependency or all account spending stops.
Before the pilot begins, record these service-specific details in the runbook:
- Expiry and reset: Note whether the limit follows a sign-up date, a calendar month, or a recurring billing cycle, and record the next expiry or reset date.
- Eligible activity: Confirm which RAG components draw on the credit or quota, including parsing, storage, retrieval, model calls, retries, and scheduled tests.
- Exhaustion behavior: Identify whether the service blocks new work, pauses workloads, limits requests, continues at a paid rate, or requires an upgrade.
- Usage visibility: Record the console page or report that shows remaining balance, resource use, quota consumption, and any forecasted spend.
- Alert action: Set alert recipients and a response owner; use an enforced cap only when stopping the specified services is an acceptable pilot outcome.
An alert is useful only when someone can act before the limit affects the test. Assign an owner to pause optional load tests, reduce test concurrency, upgrade the applicable plan, or end the pilot when the alert threshold is reached.
When the free allowance is enough, and when to upgrade
Keep a free or trial allowance for a pilot when the full representative workload fits every relevant limit through the planned test window, the required features are available, and the documented end behavior suits the test. Choose a paid plan when the forecast crosses a resource or usage threshold, the trial ends before validation is complete, or a required feature needs a different account or billing status.
Choose Starter for a bounded pilot when usage-based prepaid billing fits the team's purchasing model. Standard may suit a pilot whose measured forecast fits its usage-based postpaid terms and included allowances.
Next action
Use the measured workload to record the first expected threshold or expiry date for each relevant meter, verify the selected account’s documented response, and assign an owner to act.
Related background: Managed Vector Search SLAs: 3 Supplier Types Compared
Try Seahorse Cloud
Evaluate this workflow with your own documents and acceptance criteria.
